This is one of the issues that have people upset. I am sketchy on the details as well but I know that when the government deals with hospitals (Through Medicare) they basically won't pay the whole bill. They fight with hospitals. The hospitals THEN pass on the costs to health insurance companies and then it gets passed onto the people with health insurance.
This is where government regulation may come into play. The government will simply regulate who gets what. That is one fear. It is too early to tell at this point how much regulation will be but if costs spiral even more out of control and the government has a stake (with subsidies) they are going to have something to say about it.
That could be a good thing too... or a bad thing.
When we look at other countries with universal health care, we have two kinds:
single payer and two-tiered. In a single-payer system, you really have no choice. There is the public plan and no private plan. Private plans are simply banned. As far as I know, there is no purely single-payer system in existence: it's more of a spectrum. Canada for example is a two-tier system but leans very much towards a single-payer system in that private insurance cannot really compete with the government plan. It can only offer additional coverage that the public option dos not cover. That's why some people choose to hop the border.
Other countries have a truly two-tier system, such as Sweden and especially Singapore, and I believe the Swiss model is very two-tier too. In a truly two-tier system, the government does ensure that a highly regulated basic option is available to those who want it, while a more luxury health care option is also available for those who are willing to pay extra.
Honestly, I'd like to see more private options in Canadian healthcare, but also see the benefit of a regulation. After all, when a person is unconscious, a hospital can administer non-consensual treatment. However, what happens when the hospital puts him in his own private room with TV in a hospital with all kinds of extra amenities and then charges him the bill for that when all he wanted was to have his life saved? The insurance company has no say in what kind of services the hospital offers. So essentially the hospital can offer luxury service and then charge the bill and no one has a say in that. After all, you can't exactly object when you're unconscious, and that's where the free-market model falls apart.
If he could choose, he'd likely opt to share a room, skip the TV, the fancy meals, the tennis court downstairs, etc. and just ask for the basics. But by the time he's conscious, it's a little late for that.
So to protect the pubic from such luxury treatment against their will, isn't it reasonable to regulate at least non-consensual care? Or do we simply say that no hospital is required to provide service to anyone until they can prove they have insurance?
This is one reason the private model is somewhat flawed when it comes to health care. According to traditional capitalist theory, nothing can be charged without an agreed-upon contract between two parties signed without coercion. That's a little tricky when you're unconscious.