Is it possible that it is due to more people becoming insured that are burdensome on the system? I thought it was pretty expected that as you get more of the unhealthy parts of the population into healthcare, costs will rise for everyone else.
Hospitals pass their costs along to the insurance companies and insurance companies pass those costs along to individuals, and everything that happens in the middle is so convoluted that the average person can't make heads or tails of it to push back.