sooner or later whole world(west) is going to hire more doc at lower(not as high as it is right now) salary from East(asia). they might lower the barrier to entry. same would happen in medicine the causes are inflation, economic conditions and poor health system.
I think the system will burn down before AMA would allow any US States to import a massive amount of doctors from anywhere in the world. Which maybe is better for the rest of the world - they get to keep their doctors.