I think you are being a little bitter and overly exaggerating. Yes we all agree that debt sucks! The point is that the system already affords a great deal of protection to AMGs. If you can get through med school and get close to decent board scores, you are essentially guaranteed a residency spot as an AMG. However, as a FMG to get anything (including the leftovers) you really have to prove your competency. Now the portion of FMGs we are discussing is those who are scoring higher than a significant number of AMGs. Why should their merits be ignored simply b/c someone else graduated from a US school?
There is anecdotal evidence for almost anything in this world, but I would argue that most FMGs stay upon completing their training simply b/c they would make a fraction of what they make here if they were to go back. But for arguments sake, I don't think it is a bad thing if some of them choose to go back. As the leader of the world, I think we have a huge responsibility towards global health. Not only for the sole reason of helping others, but for our own selfish gains. If we can train someone here who will go back to their country to improve their public health infrastructure, then that means .01% less chance of Americans seeing some deadly bug in their backyard (I'm all for that). And we can go on and on about how they could produce research that ultimately benefits some Americans.....