Not enough....by far, and they're DEFINITELY not being taxed for the years of hospital assisted living that they're in for in the future. From cancer to respirators, to all the years that they will not be working, that the rest of us will be fitting the bill for.
You are right, we definitely need to add to the taxes of both. As for the food, again, it is not the food, but an individuals inability to control themselves.
The US is so fat due to its culture of more of everything is better.