Step 2: pass law forcing doctors to accept public health care recipients.
Nah, it will be much more incentive laden. Not a threat.
Something like...physicians practicing in state facilites, and employed by the state, wil be offered amnesty from medmal litigation.
That can cover GP's and specialists, and is an expense > $100,000/yr in most states. You'll have plenty of takers.
Or connect the Medicaid and Medicare programs to where you can only take both or none. But not just Medicare, which is slightly profitable right now.