It's actually an extremely difficult problem to fix. Anything new that restricts doctors in any way, shape, or form has to come from up high, and it also has to be across the board. Few hospitals have the luxury to turn away doctors, and few areas have enough doctors doing general practice. Make a new regulation, and some doctors will sigh and do it - but other doctors will move on... unless there's nowhere to move to that doesn't also have the new requirement.