I occasionally hear people speak of "sell out MDs". I once asked my cousin if he was referring to those in private practices and he replied that it more that referred to those leaving research and practicing altogether. The only thing I can think of is perhaps working for a pharmaceutical company. So I guess my question is, what is he talking about? What other careers require an MD and would categorize as "selling out"? Aside of academic medicine and practicing, what other careers would benefit from an MD at all?