Let me try to reword then:
1. Free market is NOT an appropriate solution for healthcare. There are plenty of reasons for this (assymetry of information, natural monopolies etc)
2. We can argue whether the US healthcare system is based on free market principles or not. It's exploding cost is however NOT driven by the lack of short-term personal incentives, but by the failure to link the amount billed to the true cost of the service rendered.
3. Every bill from a doctor you see is a very clear short-term incentive for keeping yourself healthy -- clearly more so than a $50 discount on your monthly insurance payment.