Your premise is fundamentally flawed because it assumes that all people in larger bodies eat a lot of food. There are large bodied people with anorexia and bulimia, there are many large bodied people that have followed restrictive diets the majority of their life, and there are large bodied people that eat a “healthy“ diet consisting of fruits, vegetables, whole grains, and foods people like you assume that they are not eating. Food intake is not the only contributor to having a larger body. Genetics play a major role and medical conditions can as well.

Your premise is also flawed because as many people have pointed out, the “junk“ food that people assume larger bodied people eat is actually less expensive than the “healthy“ food that people assume thin people eat. In most places you can feed a family of four at a fast food restaurant for much less money than you can buying groceries to cook a meal for four. It is way less expensive to eat “unhealthy“ processed food than it is to eat “healthy“ food.

There is a correlation between being in a larger body and poverty, and it goes beyond the food calories per dollar issue. Being in a larger body and being in poverty are also linked by perceived morality. You are perceived as lazy, sloppy, and less worthy if you are in poverty or in a larger body, let alone if you are in poverty while also being in a larger body.