The point of the article isn't that cheeseburgers should be all that you eat the point is how senseless all the modern war and disdain some people have for places like Wal-Mart and McDonalds. If you can afford organic food and to designer clothes that's great but for the poor places like that serve as valuable resource to provide low cost necessities like food and clothing. It would be great if poor people ate more vegetables but they are expensive. To the single mom with four kids coming home for second job with only ten dollars to her they McDonald dollar menu is a blessing. He isn't saying that poor people should only eat cheeseburgers just that wealthy foodies should stop looking down their noses at places like this and should stop acting like the Wal-Mart and McDonalds are part of the problem.
Cheeseburgers really are not that bad anyways. It is meat, dairy and bread. People pay a lot more an get no better nutritional value all the time.