I don't think the U.S. can afford all the health care Americans want
All discussions of the health care system needs to start and end with agreement on this quote, if nothing else. Of course we can't afford all the health care that we want; we also can't afford all of the iPhones that we want, or education, or anything, really. Economics is the study of how we allocate finite resources to try to satisfy infinite wants, and nowhere is that more stark than with health care.
Whether the method for allocating those finite resources is a price system, a queueing system, a random drawing, or otherwise, there are always trade-offs. The problem with health care is that nobody wants to acknowledge that some trade-off will be required. If you only use prices, then the poor won't get as much care as the rich. If you only use queues, then everybody will suffer with ailments during the wait. So we have this phenomenally complex system that tries to pretend that there are no limits to our medical resources, because while we are generally OK with the fact that rich people can have the latest iphone while others make do with generic android, or that you wait in line to get a table at your favorite restaurant, we are apparently not OK with hearing that someone doesn't get exactly the health care that they want when they want it because they don't have enough money, or other people with the same problem have booked the doctor's time for weeks.
Once we are honest about who we are willing to deny care to, then we can have a productive conversation about health care. Everyone can say "This is how I think care should be allocated" and we would create a system that allocates resources according to the wishes of the people, as expressed by their elected representatives. But instead we create layer upon layer of employer backed insurance, and government backed insurance, with some private delivery, but some public delivery, so that nobody can understand it. So now people's positions on health care reform are mere reflections of mood affiliation rather than of what they actually want out of the system.