Having worked in the health/fitness field for 16 years, mainly in corporate wellness programs, I feel at least somewhat qualified to comment on this. What I quickly learned when I started working in the field is that you can educate people, give them the information they need to make good choices, help them develop strategies to incorporate healthy habits into their lives, but you can't force them to actually make changes. The simple truth is that this is a personal responsibility and the majority of people simply are not willing to make changes in their eating and exercise habits.
Aside from that fact, it is the job of parents, not the government, to monitor and control what their children eat. I saw a woman the other night on the news who wants to stop McDonald's and other fast food restaurants from marketing to children. You see, this makes her children ask her to go there, and she's forced to say "No" and she hates saying no to her children. Well, grow up, lady, and be your children's mother, not their friend.
This out of control government of ours is usurping responsibilities and intruding more and more into our lives. Wake up, people, and take responsibility for your own choices. Quit relying on government, or pretty soon you'll find you don't have any choices.