I'm sorry but thats a BS argument. People are responsible for controlling their own eating habits, and if they want to have big portions, and the weight gain that goes with it, then thats up to them. Not to mention that at least one of the photos on that link is photoshopped - the "bigger size" pizza slices are the SAME ones in the 20 years ago pic, but photoshopped to overlay each other and then enlarged.Look at the toppings on each pic, they are the SAME. I find it difficult to give any credit to anyone that can't use facts to prove their argument.

One thing that is absolutely having an impact is the quality of ingredients.When food prices soar, people tend to stop buying more nutritious foods that require prep (like fresh fruits and veggies) in favor of prepackaged commercial trans fat laden foods (like Hot Pockets) that are often cheaper. Obesity in lower income classes is certainly due to a mixture of factors (poor self control being one of them) but cost plays a large role. In order to make ends meet, many lower income households forgo expensive fresh foods in favor of frozen convenience foods, because for 100 dollars they can get enough fresh food to last 4 days or enough crap food to last a week and a half. When the budgets tight, what choice do they really have? It becomes a vicious cycle in a way because then they get accustomed to eating that way, and even if circumstances change, they still seek out junk because its comforting and familiar.

Sorry about the rant, but this subject is a pet peeve.