Let's be clear on what problem it is you are talking about. Healthcare being not-affordable, or in other words too-much for most citizens or in other words insurance being too much? Or maybe healthcare in the sense that we aren't healthy; needing less healthcare?

The question is too vague for me. If we are talking in terms of "sicko" (the documentary) then one solution I have to say is socialized healthcare. I don't feel that social healthcare is necessarily the same as just any other social industry. Therefore people should not react in the same way. Socializing the auto industry is terribly anti-capitalism but its not the same as health-care because there is (or should) be a moral obligation to help people in need regardless of their financial state. You can't morally need a new car. It might still be possible to have private hospitals, for "premium" treatment. That already sounds rather dirty, but it reminds me of the postal service. Having government-run postal service actually made the industry better as a whole. Everyone can send a letter for 42 cents is it? but if they want it there overnight, there's fedex.