You don't understand. These countries (I live in the Netherlands, which has the same sort of system) have some history in getting their health care right. Negotiating how much various procedures should cost, how much the patient should pay, this is just business as usual: it happens every year.
Inflation as the only tool for a government to regulate it's health care costs feels a bit simplistic. In fact, it's a ridiculous idea, given the abundance of other options our government seems to have. I can only think that your misguided view is the result of coming from the hard & cold background of a runaway-free-market health care system, where there is actually NO options to get things right (it's a free market, right?) -- so the only thing you can think of is even worse than that.
Also, you forgot an important aspect. In our system, there's more money available for prevention, simply because that will keep general health care costs lower. There's hardly a place where prevention will fit in a true market driven system. (Yeah, your insurance company could have prevention programs, but an insurance company without these expensive programs would be cheaper, right? Exit prevention.)