I disagree with the conclusion. Fast food is not actually cheap. If you go to a supermarket and get a bag of rice / lentils, it will be an order of magnitude ch

I disagree with the conclusion. Fast food is not actually cheap. If you go to a supermarket and get a bag of rice / lentils, it will be an order of magnitude cheaper, if not more. The problem is 1) culture and 2) taste. Burgers do taste better than lentils.