You might argue that it's none of government's business how much fat, salt or alcohol a person consumes, even if it has adverse health care cost implications. I'd ask: Wouldn't the same reasoning apply to helmet laws and proposed obesity laws? Last year, The Child Nutrition Promotion and School Lunch Protection Act was introduced in Congress. It's a measure to prevent schools from serving "junk foods" such as pizza, burgers and French fries. If the government protects children from "unhealthy" meals at school, would you want government to also protect them from unhealthy meals at home?
When I was 14 or 15 years old, smelling myself, I thought I could take over the house. My mother told me that as long as she was paying the bills, I was going to do what she said. That's great for a parent/child relationship, but do we want the same relationship between government and its citizens?