I'm not sure if we are thinking of different things, but in the UK I believe Drs and Nurses have to stay with the NHS (or at least not work for the private sect

I'm not sure if we are thinking of different things, but in the UK I believe Drs and Nurses have to stay with the NHS (or at least not work for the private sector) for a certain period of time, if they got bursaries. That seems reasonable? Society benefits from their output, in return for paying for their education.