Christine asked "Why does a salad cost more than a Big Mac?" and noted that subsidies to farmers growing feed make a hamburger cheaper. But those subsidies have another effect: they make unhealthy food the most cost-effective way of delivering calories to poorer families. Michael Pollan notes that "the most reliable predictor of obesity in America today is a person’s wealth." -the rich can afford less calorie-dense foods.
As an example, this tub of lard costs about twenty-five bucks, contains 105,000 calories of food energy and 11,200 grams of saturated fat. That is enough food energy to feed a person for almost two months; a dollar buys you 4200 calories. A study quoted by Michael Pollan found that a dollar buys you 1200 calories in potato chips, but only 250 calories of carrots.
People aren't stupid; if you have to feed your family, you go for the cheap, calorie dense subsidized stuff. Lard idea from ::Rural Vegan