Tax Junk Food/Regulate Contents?

[Michael-5]

dsgrue3 said:

Producers pass cost onto consumers. If it costs them 15% more to make the product, it will cost 15% more to us.

No reason for me to pay more for ice cream because of the irresponsibility of the morbidly obese.

That makes sense, but what if we cut some other tax to balance it out again? What if sales tax on food cost 5% less, but junk food cost 15% more. If you're skinny, you probably eat a moderatly healthy diet correct? This would probably benefit you more, and at the same time, this would force obese people to eat less, thus making women better looking around you.