Low Tariffs On Doctors

Dean Baker wants the market in doctors to be freer:

Increasing the openness of the United States to highly trained medical personnel should be on every trade economist’s mind. Doctors in the United States, especially highly trained specialists, earn far more than their counterparts in Western Europe or Canada, at least in part because it is very difficult for doctorseven those who meet our high standardsto train in other countries and then work in the United States. Licensing procedure acts as a trade barrier.

What if, however, the government sought to remove the barriers for foreign physicians in the same way that it sought in NAFTA to remove barriers for imported goods manufactured in Mexico?