Why is it the government's responsibility to control fatties?

It's not any governments responsibility to control how much people eat, but it IS the governments responsibility to control WHAT we eat. High fructose corn syrup is extremely fattening and it's in EVERYTHING. So it's fattening, drives up the price of goods and reduces our ability to manufacture ethanol from corn which would help alleviate our dependence on foreign oil. It's also the governments responsibility to make sure that food companies aren't poisoning us with artificial sweeteners, artificial flavors, preservatives or pesticides. Yes, we're free to buy what we want, but we can only make informed decisions when the Corporations give us ACCURATE information about what we're eating. If you had the choice of buying a loaf of bread that had a preservative that may cause cancer vs. buying a loaf of bread without that preservative, most of us would opt for the one without, but if we don't know it's there and don't know what it does, we'll just keep buying that loaf of bread and keep poisoning ourselves. It is the job on any/ EVERY government to look out for the best interests of its People.