who on earth thought corn-soybean mush was a good idea.

The U.S. government has the same problem with the food pyramid recommendations. Who really thinks the biggest part of the food pyramid consisting of grains (carbohydrates) is going to keep people healthy?

Nutrition guidelines aren't actually based on a healthy diet, they're based on what's traded on the commodities market, corn and soybeans being two of the major food trades along with grain.

If you want to see a movie that discusses this very well, watch Fat Head. Great film!