How about capping the salaries of doctors at, say, 100,000 and nurses at 60,000? US salaries in health care are incredibly high. Administration and the like could be capped at the nurse level. Only a very small minority could realistically get higher paying jobs outside the US anyway. If your main motivation is to make a lot of money, choose a different career.

Also, cap profits to almost zero while moving to a completely not-for-profit system.