There are many, many models outside of the USA that would give cheaper, more complete and more comprehensive cover for ALL of the US citizens. Nor do such systems impinge one whit on the richest’s ability to pay for more and better and quicker.
The problem is not finding one that works, it is building the political will do do it. All the details discussed in this thread and others like it are simply a distraction, they have been solved dozens of times before.
You won’t get to a working system by degrees, too many vested interests. The real issue is, will any administration ever had the clout and the balls to force through the quantum leap that is needed?
On a federal level it’ll take a while. Part of obamacare created a pathway that makes it easier for states to reform their health care system, just so long as they do the same things as Obamacare or better (cover everyone, cost the same or less, have the same consumer protections).
Vermont passed a health reform bill that starts in 2014. Montana is considering a single payer system.