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Modernising the regulation of medical migration: moving from national monopolies to international markets

Abstract

Background

Traditional top-down national regulation of internationally mobile doctors and nurses is fast being rendered obsolete by the speed of globalisation and digitisation. Here we propose a bottom-up system in which responsibility for hiring and accrediting overseas staff begins to be shared by medical employers, managers, and insurers.

Discussion

In this model, professional Boards would retain authority for disciplinary proceedings in response to local complaints, but would lose their present power of veto over foreign practitioners recruited by employers who have independently evaluated and approved such candidates' ability. Evaluations of this kind could be facilitated by globally accessible National Registers of professional work and conduct. A decentralised system of this kind could also dispense with time-consuming national oversight of continuing professional education and license revalidation, which tasks could be replaced over time by tighter institutional audit supported by stronger powers to terminate underperforming employees.

Summary

Market forces based on the reputation (and, hence, financial and political viability) of employers and institutions could continue to ensure patient safety in the future, while at the same time improving both national system efficiency and international professional mobility.

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Background

Rates of international medical migration have risen sharply in recent decades, creating new debates over professional opportunity and fairness[1, 2]. These debates have in turn raised questions as to the utility of current professional regulatory systems, which have evolved at a relatively slow pace over the last three centuries[3]. The key challenge for any such regulatory system has always been that of protecting the public from the exaggerated claims of mere ‘druggists’ and ‘apothecaries’[4] whilst also preventing exploitation, albeit inadvertent, by professional organisations - including those administrative bodies entrusted with regulatory powers[5]. With respect to such regulatory bodies, one factor predisposing to exploitation in the modern age is the substantial income receivable which, once entrenched as a standard requirement, can easily become self-perpetuating. Indeed, annual running costs for national regulatory offices may exceed US$100m[6].

Predictably, national Councils empowered to control physician/nurse licensing have become targets for criticism themselves. The power of the media has ensured that public perception of errors licensing foreign-trained practitioners causes severe damage, contributing to a defensive and inefficient regulatory culture[7, 8]. It is therefore not surprising that pent-up disillusion with the global regulatory culture has begun to run deep in some quarters:

The process is out of control, and quite uncaring. (Medical Councils) are seemingly above the law, do not observe ‘rules of evidence’, and are composed of people who are not doctors (and hence) have no understanding. Many careers and lives have been blighted by (their) protracted pseudo-legal activities (and) institutional hypocrisy. Medical professionals are the only group… who are assumed, often on the basis of unsubstantiated complaints, to be guilty liars, and prematurely punished [[9]].

In the light of such sentiments, we examine here the development of today’s medical licensing systems, and discuss factors implicating a need for urgent change.

Globalisation vs. bureaucracy

Human society is changing faster than ever, driven by revolutionary increases in personal mobility (globalisation) and information transfer (digitisation). This abrupt transition to a flatter world has eroded the once-impenetrable barriers defining nation-states[10]: for example, English has become the undisputed lingua franca of scientific communication[11], while currencies and finance have become progressively deregulated[12]. In the medical world, international clinical services (‘medical tourism’) are now commonplace[13], north–south health dialogues are multiplying[14], practice standards are converging to global accreditation norms[15], while even the training of junior doctors[16] and nurses[17] is venturing offshore. Partly as a result of such changes, the traditional role of national agencies regulating the health sector is receiving fresh scrutiny[18]. For example, the medical licensing industry - which has long proclaimed patient safety as its sole raison d’être, but in practice also protects the jobs of its local clinical and administrative workforces - is now having to face such reappraisals[19]. The emerging clash is a familiar one of the new and the old: namely, in this context, the irresistible force of globalisation versus the immovable object of bureaucracy.

Bureaucracy is essential to developed societies, regulating as it does the complex activities of large populations. Yet despite its virtues, bureaucracy is negatively identified with a proliferation of 'red tape’ by many audiences - including younger people[20], businesses[21], and academics[22] –and is often criticised by specific biomedical sectors, such as those involving laboratory research[23, 24], clinical trials[25, 26] and ethics committees[27, 28]. Indeed, some critics have even suggested the idea of ‘making bureaucracy work’ to be oxymoronic[29]. Others have noted that bureaucratic cultures are inherently fearful of debate and innovation, yet concede that rapid change can eventually force adaptations[19]. In the following sections we discuss the limitations of nation-based systems for regulating medical migration in a newly hypemobile world, and argue for a more flexible model in which market forces contribute to the regulatory framework (Figure1).

Figure 1
figure 1

Divergent models of regulating medical competence: performance-based (market-regulated) vs. rules-based (top-down) systems . The market-based model, shown at left, proposes (i) to regulate medical workforce numbers through demand (i.e., the effects of institutional reputation and performance management on attracting patients, as shown at bottom left) for agreed evidence-based and cost-effective treatments, rather than through restricting provider supply as at present (top right); and (ii) to maintain the safety and quality and quality of medical work through employer- and/or insurer-led audit of relevant clinical indicators (top left) rather than relying upon adherence to centrally-administered educational programmes as currently practised (bottom right).

The Certificate of Good Standing: time to sit down

Historically, the model under which the professions operated involved conferral of professional status upon a practitioner following completion of a prescribed course of study and practice. Once conferred, the assumption was that professional status was indefinite; no assumption was made that professional skills, once learned, would atrophy, warranting removal of professional status. Hence, the original role of the regulatory authorities was itself regulated in terms of scope. This limited governance model has since been subverted by inexorably rising bureaucratic intrusion into issues of professional competence, even though such encroachment into professional spheres has seldom if ever been justified by empirical evidence. On the other hand, any such expansion of bureaucratic remit might well seem attractive to regulators, given its implications for winning more public funding and control.

Despite this recent expansion of regulatory authority in most countries, Council-centric monopolies on medical credentialing are now being pressured by an acceleration of professional migration[30]. A linchpin of international cross-credentialing in this context has been the Certificate of Good Standing (CGS) or its local equivalent, provision of which signifies ‘no complaints received by the outgoing Board’. Being a complaints-based system, individual practitioners usually have no difficulty securing a CGS in the absence of a formal allegation of misconduct against them, even if less formal complaints have been trumpeted in the press or media. Yet no CGS will be issued to any doctor against whom a complaint is pending, regardless of expected delays in considering the complaint - even if the complaint in question is patently frivolous or vexatious, or if the complaint is of a local nature that is irrelevant to the jurisdiction of the receiving Council. Indeed, if a complaint has been received but not yet considered by a Council – a process that may sometimes take months or even years to complete – the only help that will be considered by most Councils is to issue a so-called ‘Certificate of Standing’ which, by confirming that ‘Good Standing’ is not awarded, effectively confirms ‘Bad Standing’ and thus debars the practitioner - typically still licensed and practising without constraint or stigma in his/her own jurisdiction - from employment abroad. The justification of 'defending the public interest’, as is customarily invoked by regulators in this context, often exacts a heavy price on the medical needs of patients and employers abroad, not to mention the reputation and careers of practitioners seeking to migrate - who, in the majority of cases, are ultimately cleared of wrongdoing[31]. The present CGS-based system may thus offer the worst of both worlds: on the one hand, it is a potential impediment to the global mobility of well-qualified practitioners; while on the other, it offers employers little solid assurance of having excluded unsafe workers, and could even foster an illusion that all CGS-approved medical immigrants are equally competent.

Phantom of the AHPRA

The recent history of regulation in Australia illustrates the difficulties many countries are experiencing as national health bureaucracies continue to expand. A Council of Australian Governments (COAG) agreement in 2006 led to the establishment of a national scheme for registration and training of the health workforce following recommendations made by the Productivity Committee examining supply and demand in the health workforce. Ironically, given what followed, the mandate for the COAG agreement was based on the simplification of processes that a national scheme was expected to bring.

The result was not a more streamlined system, as it turned out, but an enlarged bureaucracy - the Australian Health Practitioner Regulation Agency (AHPRA) - with redoubled authority to regulate the health workforce. To this end AHPRA was empowered to create de novo statutory standards for the healthcare professions, which it has so far done in relation to continuing professional development (CPD) and recency of practice. Yet by early 2011 a Senate Inquiry had been launched into the ‘chaos’, ‘massive delays’ and ‘bunglings’ of AHPRA, which had erroneously blocked registration renewals for thousands of medical practitioners; the shadow Minister for Health called the situation ‘the height of incompetence’, while even the conservative Australian Medical Association condemned AHPRA’s debut as a ‘debacle’[32].

In hindsight, such errors are unsurprising. There could hardly have been more conducive circumstances to a fiasco than those relating to this new national scheme which overnight brought into existence an expanded unelected bureaucracy with massive discretionary powers. AHPRA provided little justification for its failings in its evidence to the Senate Inquiry, and the anonymous officials responsible for the affair never defended their actions; indeed, AHPRA couched its responses in self-congratulatory terms which denied that anything very much had gone wrong at all (AHPRA Media Release 24 March 2011; AHPRA Submission to the Senate Inquiry 14 April 2011). Such behaviour is typical of a Weberian bureaucracy, which maximises its power by the application of rules with little regard to the justification for which such rules were originally designed[33].

The ‘brain drain’

A further example of the inflexibility of the present regulatory system relates to the net emigration of physicians from first-world countries between 1960 and 1980, partly in response to disillusionment with stifling overregulation[34]; a bureaucratic readjustment eventually reversing this trend occurred a decade later[35]. A similar professional exodus has since occurred amongst South African physicians for political reasons, and among Filipino nurses for economic reasons[36], illustrating the fluidity with which healthcare workforce skills may be transferred across borders in the globalising age[37].

It is not surprising that such high professional mobility also has its problems. For example, migrant health professionals remain vulnerable to sudden reversals of regulations affecting their employability[38, 39]; highly-trained staff often face official barriers in gaining employment at anywhere near their pre-migration skills level, often ending up in relatively menial or junior roles[40]; while oscillations of national workforce oversupply and shortage are further complicated by migration fluxes[41, 42]. The latter issue is politically delicate, involving as it often does the movement of health professionals from poorer to richer countries, leaving the former more in need[43]. At first glance this latter problem would appear to create a moral imperative for developed-world regulators to restrict the registration of incoming health-care workers. But the reality is more complex[44]; some developing countries have developed a successful industry in training and exporting nurses, for example, generating a valuable influx of foreign capital back to the national economy[36]. The ethics of healthcare worker migration thus need to be considered not only in medical skills terms, but also against the broader socioeconomic background[45].

Discussion

To expedite the safe yet efficient migration of foreign (-resident or -qualified) healthcare workers, an internationally accessible database of current work-related complaints and past (upheld) offences is one quality control measure which could be created. A national Register for this purpose could be accessed by potential foreign employers on being granted permission by the job candidate in question; in support of this proposal’s credibility, it has been noted that a significant proportion of malpractising health practitioners are repeat offenders[46]. If a practitioner in country A has an unresolved complaint against his/her name, an employer in country B would have options either (i) to delay, or decide against, granting a contract, (ii) to offer a contract in which continuation was conditional upon dismissal of the complaint, or (iii) having been given the details of the complaint, to consider the relevance in country B of the complaint lodged in country A (e.g., the Hong Kong Medical Council has not allowed medical practitioners to quote Ph.D. degrees without going through a formal Council pre-approval process, whereas most other national Councils have no objection to this).

Representatives of Royal Colleges and other professional bodies have long argued the need for credentialing to be the responsibility of clinicians rather than of government. In the light of this debate, it is easy to understand the desire of both parties to control CPD requirements and/or license revalidation. Yet the perennial issues surrounding CPD - not only who should regulate it, but also how much should be carried out over what period, how it should be assessed, whether it should be linked to license renewal, and (above all) whether it actually achieves its stated justification of substantively improving patient safety - could be simplified by an employer-led model of contracts and liability. Such a system would fit the common purpose of employer and employee to maintain competence and safety; the benchmarks by which employers and employees monitor practice could be mutually agreed, strengthening audit via emphasis on meaningful clinical indicators rather than on educational marking schemes of presumed but unproven value, Indeed, to the best of our knowledge, the value of post-licensing education has never been proven in any context; for example, post-licence driver education has been reported to be ineffective in reducing car accidents[47]. These and other suggestions for change to the status quo are summarised in Table1.

Table 1 Revised functions of national medical Boards in a market-based regulatory system

Summary

Bureaucracies have important benefits when first applied, such as the imposition of rule-based systems and employee protection. Such benefits tend to atrophy over time, however, being replaced by an expansionary culture that is often only curtailed by the inefficiencies and economic strains that result. Indeed, many countries are already moving their public medical systems away from bureaucracy-dominated models, and towards more market-sensitive cultures working together with clinical governance[48]. We submit that an optimal compromise between the recognised societal shortcomings of market-based systems[49] and the logistic failings of bureaucracy-dominated systems can be best maintained in the healthcare sector, as in other sectors, by a more dynamic balance of supply-and-demand forces on the one hand and electorally-guided legal reforms on the other[50].

Authors’ information

The views of the authors represent their own personal opinions, and not the view of any organisation with which they are associated.

Abbreviations

AHPRA:

Australian Health Practitioner Regulatory Agency

CGS:

Certificate of Good Standing

CME:

Continuing medical education

COAG:

Council of Australian Governments

CPD:

Continuing professional development.

References

  1. Kanchanachitra C, Lindelow M, Johnston T, Hanvoravongchai P, Lorenzo FM, Huong NL, Wilopo SA, dela Rosa JF: Human resources for health in southeast asia: shortages, distributional challenges, and international trade in health services. Lancet. 2011, 377 (9767): 769-781. 10.1016/S0140-6736(10)62035-1.

    Article  Google Scholar 

  2. Humphrey C, Hickman S, Gulliford MC: Place of medical qualification and outcomes of UK general medical council “fitness to practise” process: cohort study. BMJ. 2011, 342: d1817-10.1136/bmj.d1817.

    Article  Google Scholar 

  3. Raach J: English medical licensing in the early seventeenth century. Yale J Biol Med. 1944, 16: 267-288.

    Google Scholar 

  4. Argus: The medical registration bill. Lancet. 1847, 49: 470-471.

    Article  Google Scholar 

  5. Fitz RH: The legislative control of medical practice. Boston Med Surg J. 1894, 130: 637-641. 10.1056/NEJM189406281302601.

    Article  Google Scholar 

  6. General Medical Council: Business plan 2012. 2012, London,http://www.gmc-ukorg/Business_Plan_2012pdf_47269459pdf,

    Google Scholar 

  7. Irvine D: The changing relationship between the public and the medical profession. J R Soc Med. 2001, 94 (4): 162-169.

    Google Scholar 

  8. Smith R: Profile of the GMC: the council’s internal problems. BMJ. 1989, 299 (6690): 40-43. 10.1136/bmj.299.6690.40.

    Article  Google Scholar 

  9. Blinde T: Altruism in medicine: is it declining?. Physician Life. 2011, March/April:12–16.

    Google Scholar 

  10. Fried BJ, Harris DM: Managing healthcare services in the global marketplace. Front Health Serv Manage. 2007, 24 (2): 3-18.

    Google Scholar 

  11. Baussano I, Brzoska P, Fedeli U, Larouche C, Razum O, Fung IC: Does language matter? a case study of epidemiological and public health journals, databases and professional education in french. German and Italian. Emerg Themes Epidemiol. 2008, 5: 16-10.1186/1742-7622-5-16.

    Article  Google Scholar 

  12. Hausler G: The globalization of finance. Finance and Development. 2002, 39(1).

    Google Scholar 

  13. Horowitz MD, Rosensweig JA, Jones CA: Medical tourism: globalization of the healthcare marketplace. MedGenMed. 2007, 9 (4): 33-

    Google Scholar 

  14. Baguley D, Killeen T, Wright J: International health links: an evaluation of partnerships between health-care organizations in the UK and developing countries. Trop Doct. 2006, 36 (3): 149-154. 10.1258/004947506777978181.

    Article  Google Scholar 

  15. Touati N, Pomey MP: Accreditation at a crossroads: are we on the right track?. Health Policy. 2009, 90 (2–3): 156-165.

    Article  Google Scholar 

  16. Drain PK, Holmes KK, Skeff KM, Hall TL, Gardner P: Global health training and international clinical rotations during residency: current status, needs, and opportunities. Acad Med. 2009, 84 (3): 320-325. 10.1097/ACM.0b013e3181970a37.

    Article  Google Scholar 

  17. Mill J, Astle BJ, Ogilvie L, Gastaldo D: Linking global citizenship, undergraduate nursing education, and professional nursing: curricular innovation in the 21st century. ANS Adv Nurs Sci. 2010, 33 (3): E1-E11.

    Article  Google Scholar 

  18. DeBakey ME: The role of government in health care: a societal issue. Am J Surg. 2006, 191 (2): 145-157. 10.1016/j.amjsurg.2005.09.016.

    Article  Google Scholar 

  19. Taylor JR: Understanding the bureaucratic mind - an analysis of homo bureaucraticus. Can J Plast Surg. 2009, 17 (1): 6-

    Google Scholar 

  20. Goodsell CT: The contented older client of bureaucracy. Int J Aging Hum Dev. 1981, 14 (1): 1-9. 10.2190/M5TY-46XE-U09Y-K21K.

    Article  Google Scholar 

  21. Oliver S, Harrison JJ: A journey from bureaucracy to enterprise. Health Manpow Manage. 1996, 22 (1): 10-15. 10.1108/09552069610113327.

    Article  Google Scholar 

  22. Wolinsky H: B for bureaucracy. EMBO Rep. 2010, 11 (9): 664-666. 10.1038/embor.2010.121.

    Article  Google Scholar 

  23. Massarani L: New framework needed to thwart Brazil’s crippling bureaucracy. Nat Med. 2011, 17 (10): 1171-

    Article  Google Scholar 

  24. Lawrence PA: Real lives and white lies in the funding of scientific research: the granting system turns young scientists into bureaucrats and then betrays them. PLoS Biol. 2009, 7 (9): e1000197-10.1371/journal.pbio.1000197.

    Article  Google Scholar 

  25. Ginn S: Global clinical trials are burdened by excessive bureaucracy, conference hears. BMJ. 2011, 343: d6322-10.1136/bmj.d6322.

    Article  Google Scholar 

  26. Greener M: The good, the bad and the ugly red tape of biomedical research. How could regulators lower bureaucratic hurdles in clinical research without compromising the safety of patients?. EMBO Rep. 2009, 10 (1): 17-20. 10.1038/embor.2008.237.

    Article  Google Scholar 

  27. McNeill PM: Research ethics review and the bureaucracy. Monash Bioeth Rev. 2002, 21 (3): S72-S73.

    Article  Google Scholar 

  28. Hansson MG, Gattorno M, Forsberg JS, Feltelius N, Martini A, Ruperto N: Ethics bureaucracy: a significant hurdle for collaborative follow-up of drug effectiveness in rare childhood diseases. Arch Dis Child. 2012, 97: 561-563. 10.1136/archdischild-2011-301175.

    Article  Google Scholar 

  29. Balle M: Making bureaucracy work. J Manag Med. 1999, 13 (2–3): 190-200.

    Article  Google Scholar 

  30. Bundred PE, Levitt C: Medical migration: who are the real losers?. Lancet. 2000, 356 (9225): 245-246. 10.1016/S0140-6736(00)02492-2.

    Article  Google Scholar 

  31. Hwang NH: Defaming a physician’s career. The double edged sword of peer review privilege and immunity. J Leg Med. 2004, 25 (1): 95-109. 10.1080/01947640490401948.

    Article  Google Scholar 

  32. O’Brien M: AHPRA faces Senate inquiry. Medical Observer. 2011, March 29; http://www.medicalobserver.com.au/news/ahpra-faces-senate-inquiry

    Google Scholar 

  33. Millet P, Sandberg KW: Time for change: can empowerment be a solution to meet the perils of modern day working life?. Work. 2005, 24 (3): 291-295.

    Google Scholar 

  34. Wright D, Mullally S, Cordukes MC: “Worse than being married”: the exodus of british doctors from the national health service to canada, c. 1955-75. J Hist Med Allied Sci. 2010, 65 (4): 546-575. 10.1093/jhmas/jrq013.

    Article  Google Scholar 

  35. Wright D, Flis N, Gupta M: The ‘Brain Drain’ of physicians: historical antecedents to an ethical debate, c. 1960-79. Philos Ethics Humanit Med. 2008, 3: 24-10.1186/1747-5341-3-24.

    Article  Google Scholar 

  36. Masselink LE, Lee SY: Nurses, Inc.: expansion and commercialization of nursing education in the philippines. Soc Sci Med. 2010, 71 (1): 166-172. 10.1016/j.socscimed.2009.11.043.

    Article  Google Scholar 

  37. Cutcliffe JR, Bajkay R, Forster S, Small R, Travale R: Nurse migration in an increasingly interconnected world: the case for internationalization of regulation of nurses and nursing regulatory bodies. Arch Psychiatr Nurs. 2011, 25 (5): 320-328. 10.1016/j.apnu.2011.03.006.

    Article  Google Scholar 

  38. Esmail A: Asian doctors in the NHS: service and betrayal. Br J Gen Pract. 2007, 57 (543): 827-834.

    Google Scholar 

  39. Trewby P: International medical graduates: lessons from the past and hopes for the future. Clin Med. 2008, 8 (3): 283-287.

    Article  Google Scholar 

  40. Kolawole B: Ontario’s Internationally educated nurses and waste in human capital. Int Nurs Rev. 2009, 56 (2): 184-190. 10.1111/j.1466-7657.2008.00666.x.

    Article  Google Scholar 

  41. Ross SJ, Polsky D, Sochalski J: Nursing shortages and international nurse migration. Int Nurs Rev. 2005, 52 (4): 253-262. 10.1111/j.1466-7657.2005.00430.x.

    Article  Google Scholar 

  42. Aiken LH: US nurse labor market dynamics are key to global nurse sufficiency. Health Serv Res. 2007, 42 (3 Pt 2): 1299-1320.

    Article  Google Scholar 

  43. Gross JM, Rogers MF, Teplinskiy I, Oywer E, Wambua D, Kamenju A, Arudo J, Riley PL, Higgins M, Rakuom C: The impact of out-migration on the nursing workforce in kenya. Health Serv Res. 2011, 46 (4): 1300-1318. 10.1111/j.1475-6773.2011.01251.x.

    Article  Google Scholar 

  44. Nichols BL, Davis CR, Richardson DR: An integrative review of global nursing workforce issues. Annu Rev Nurs Res. 2010, 28: 113-132. 10.1891/0739-6686.28.113.

    Article  Google Scholar 

  45. Scott ML, Whelan A, Dewdney J, Zwi AB: “Brain drain” or ethical recruitment?. Med J Aust. 2004, 180 (4): 174-176.

    Google Scholar 

  46. Grant D, Alfred KC: Sanctions and recidivism: an evaluation of physician discipline by state medical boards. J Health Polit Policy Law. 2007, 32 (5): 867-885. 10.1215/03616878-2007-033.

    Article  Google Scholar 

  47. Ker K, Roberts I, Collier T, Beyer F, Bunn F, Frost C: Post-licence driver education for the prevention of road traffic crashes: a systematic review of randomised controlled trials. Accid Anal Prev. 2005, 37 (2): 305-313. 10.1016/j.aap.2004.09.004.

    Article  Google Scholar 

  48. Jacobs K: The management of health care: a model of control. Health Policy. 1994, 29 (1–2): 157-171.

    Article  Google Scholar 

  49. van de Ven WP: Market-oriented health care reforms: trends and future options. Soc Sci Med. 1996, 43 (5): 655-666. 10.1016/0277-9536(96)00111-6.

    Article  Google Scholar 

  50. Anell A: The monopolistic integrated model and health care reform: the swedish experience. Health Policy. 1996, 37 (1): 19-33. 10.1016/0168-8510(96)00821-4.

    Article  Google Scholar 

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The article was conceived and approved by both authors. RJE contributed most to the medical sections, while SDE contributed most to the discussion of medicolegal issues. Both authors read and approved the final manuscript.

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Epstein, R.J., Epstein, S.D. Modernising the regulation of medical migration: moving from national monopolies to international markets. BMC Med Ethics 13, 26 (2012). https://doi.org/10.1186/1472-6939-13-26

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