I’m not really comfortable with government run anything, but given a choice between for profit health care administrators and for profit insurance companies or the government, I’ll take the government.
Medicare actually works more or less ok. The biggest problem is that many doctors will not accept Medicare patients. If everyone were on Medicare most doctors would have no choice. As long as you have the good supplemental insurance Medicare is ok.
It’s a program that is already up and running and would be easy to expand just by lowering the qualifying age in increments over a few years.