Why do Americans want Universal Health care when it has clearly failed?

America has the highest cancer survival rates in the world (this includes all citizens, even those without health insurance). We also have the shortest wait times and highest quality. 8 of the top 10 medicines have been developed in America, it is a place where innovation flourishes. I agree that some changes should take place. But how about less government, not more? Why would we want to change this into a government run system?