British May Ban Happy Hour
When you don't pay for something, it isn't really yours. The same is true for healthcare. In a socialized healthcare system, the "people" collectively pay. This presents the slippery slope of control - over behavior that is.
Smoking is not healthy. But when the "people" are paying to treat smoking related illness, their desire to ban smoking increases. Same goes for drinking, McDonald's, lack of exercise, etc. There is a direct relationship between directness of purchasing and control over related behavior. Go ahead and have the government pay for healthcare, but be ready for society to then regulate each and every behavior that has an impact on your health.