government mandated preventative care?

I'm curious to know how government sponsored preventative care is going to work. While I am hopeful that there will be a new emphasis on nutrition and exercise, I truly wonder how the government can influence people's personal decisions. Will people all of a sudden eat well, exercise regularly and stop smoking just because Obama says so? Will a healthy lifestyle be incenvitized by taxing "unhealthy" things heavily? Or will we as a nation go bankrupt trying to control each other's lives and then ultimately be forced to take responsibility for our own health?

only time will tell i guess.