After reading the Mckinsey report the only long term solution that I see would be for the government to take such an dominate role as the temporary "single payor" that private insurance would have no choice but to limit the payments to doctors, hospitals and drug companies. After many years of general economic inflation while holding medical payments down could we then could see our medical costs drop into the low teens of GDP.
Anyway you look at it we cannot stay on the path we're on.