I'm not worried about hordes of FMGs takin' our jerbs, but if we want to level the playing field, we should explore ways of making American medical education cheaper. I would say that American medical education is substantially more expensive without being that much better than, say, European medical education.
For instance, most countries start students in medical school straight out of high school. You can say all you want about how people need "more time to mature," etc. but the fact of the matter is that these medical students become good doctors, and two years sooner than American med students. Because they don't have to pay for a separate degree before even starting med school, their education costs are lower.
Also, because student loans are infinitely available for medical school, and because people overestimate the likelihood of getting PSLF, there is minimal downward pressure on med school tuition. Doing something to address the rising debt burden of American physicians would be huge.