jar writes:
It really is simple. Pick one and do what they did.
Singapore has been put forward as a good model, for what it's worth. You can get basic care through government healthcare at a private hospital and a doctor of the government's choosing, or you can spend more and see the doctor you want to see, and better hospital accommodations. You get the level of care that you want, but have to pay more for more luxurious care. You would have a "Medicare-for-All" basic plan, and people could still buy private insurance for the care of their choice if they so choose. The biggest benefit would be getting everyone in the same insurance pool so there isn't a bunch of sick people in one risk pool.
The biggest hurdle the US has to get over is price control. At some point, the government has to step in and standardize costs, and keep dialing prices back over time as the industry adapts.