From the Voter Study Group. People favor a public option:
According to recent polls, most Americans also believe that the government has a moral duty to provide all citizens with health care. A full 70 percent approve of a public option, which would allow all Americans to buy into Medicare. This would give universal or near-universal health coverage to Americans, and amount to a massive wealth transfer from rich to poor.
but don't necessarily want to lose their current insurance plan (my emphasis):
Indeed, political scientists have also found that most voters are highly loss-averse and deeply sensitive to perceived threats to their material standing. So while they may have only vague opinions on issues that are abstract and feel distant from their daily lives, they are also likely to react strongly when they fear that they may lose a concrete benefit to which they have long been accustomed. This makes it all the more concerning that leading Democratic contenders, including Sanders, Senator Elizabeth Warren, and (at various instances) Senator Kamala Harris, have endorsed abolishing private health insurance.
Politically removing private plans is a problem, and I too have concerns about that. But I know the reason. If we make it where only sick people sign up for Medicare, Medicare's cost per person is going to go through the roof. In 3 years, CO will be here showing charts and figures about how government health insurance is a clear failure and that we need to scrap the system. So the concept is to get the sick and healthy into the same plan so the overall cost is properly distributed. It all is completely logical but unfortunately it cannot win an election.
Also, private plans are very expensive for employers. Our corporations are paying for healthcare and none of their international competitors are. It would make us much more competitive if that cost were not born by our corporations. But again, I cannot think of a way to make that a winning position politically even though it makes total sense.