Honey, calories aren't nutrition. You can get a crap burger at McDonalds for a buck but their salad costs four.
But if you have the money to buy calories, you have the money to buy nutrition. Burgers are less becuase it is their main lure. They offer salads as a courtesy to those customers that want it, but it is not cost effective at a lower price based on the quantity they sell.
If one were to go to the local supermarket, they would be able to put together a much more nutirtious meal with less money than they would spend at Burger King for a Whopper Meal supersized.
A hamburger that costs $1? You can't beat that cost trying to eat a nutritious meal, you just can't.
Give Me Your Tired, Your Poor, Your Big Fat Asses Â…
Those in greatest need, furthermore, tend to be both poor and fat. We know, for instance, that the lower your income, the more likely you are to inhabit an "obesogenic" environment. Food options in poor neighborhoods are severely limited: It's a lot easier to find quarter waters and pork rinds on the corner than fresh fruit and vegetables. Low-income workers may also have less time to cook their own meals, less money to join sports clubs, and less opportunity to exercise outdoors.