I don't understand, they compete like any other business? The same for less money or a better product for the same (or more) money (a poor product for even less money, of course, is not an option).
Providers, dammit, not insurers. Makes sense now. Sorry.
Good question, I don't actually know. Surely the insurers will make them compete, but that should also happen in the US, and obviously not fixing the problem.