Mr. Curry suggests doctors and radiologists are two different groups but radiology is a medical specialty. As an aside, the Hippocratic Oath, often thrown at negotiating physicians, hasn't been in our medical schools since maybe the fifties.
 
Canadian physicians, particularly in the "have" provinces, aren't exactly suffering, especially some subspecialty members.  I doubt the physicians who are squealing loudest now would offer recent tax returns  to demonstrate the "brutality" of the proposed tax upon their income. But both sides of this negotiation can do better.

Some Canadian docs could always secure positions in desirable American medical centres but many could not. The warning cudgel that "thousands" of physicians would seek professional asylum in the US flies in the face of the long daunting, and growing differences, in the spectrum of practicing and living in America. In 2016, it  seems an awful lot of Yankees would like to move up here.