Time was when physicians were expected to spend some of their time taking care of poor people. In order to be a member in good standing of the medical association in Philadelphia, then the great center of medical learning in the country, a physician had to spend half of his time taking care of the poor. This was done in charity hospitals, and doctors would often take the opportunity to teach students as part of that duty.
Time went by and this approach became obsolete. Medicare came in, then Medicaid. Legal decisions whittled away at the medical association's authority to govern physicians. Charity hospitals started hiring physicians to be on their staffs. Many physicians took lower pay for part time work in those hospitals.
Over the years reimbursement for service to Medicaid patients has gotten so low that physicians are losing money for every patient they see. Some doctors limit the number of Medicaid patients they see, others opt out of the program all together. As reimbursement gets worse and worse more physicians are opting out.
So the inevitable has happened, and a Democratic politician has
proposed laws mandating that physicians treat Medicaid patients. This, in effect, is mandating that physicians treat them for free since the reimbursement doesn't even cover their expenses. My understanding is that the ACA will increase Medicaid reimbursement to some extent, but even so it will represent a big reduction in practice revenue.
So far this is just one Democrat in one state, but it's something that's bound to grow legs as the ACA kicks in and Medicaid patients (and Medicare patients, for that matter) can't find doctors. If that happens then I can almost guarantee that a large number of physicians and other health care professionals will leave the profession because they will have no other choice.