Nobody thinks someone else will pay for it. I am paying for Medicaid and Medicare, also Social Security. The vast majority of people aren't as dumb as you think.

Since the ACA has been in effect, I have made every health decision myself. Nobody from any government agency has been involved. It will be that way if the US embraces a single payer system. The whole "government will control your health" is a red herring the right uses to instill fear.