Disagree again, it comes down to evolution, yes they would eat more with the given opportunities, but evolution has set them to the proper settings to run correctly on the environment. The wide spread feasibility of getting food is not a good thing in a society without control, especially when done in a quick timeline.
We feel excessive hunger, and crave fatty food because it is not readably available in our natural settings. With the excessive cravings we hunt this food down, but only get a small portion (compared to our cravings) in order to still want more. Because there was only small amounts of certain foods available, we needed to crave it more in order to feel it worthy in hunting it down.
Our hunger and wantings are not suitable to our current environment, we should crave heavily vegetables and fruit as meals, while only wanting chocolate on the odd occasion, it's one of the negative effects of NS not being applicable to us anymore.