Wet milling (to produce starch) is an energy-intensive way to make food; for every calorie of processed food it produces, another ten calories of fossil fuel energy are burned.

Today it [high fructose corn syrup] is the most valuable food product refined from corn, accounting for 530 million bushels every year. (A bushel of corn yields 33 pounds of fructose)

Try as we might, each of us can eat only about 1500 pounds of food a year. What this means for the food industry is that its natural rate of growth is somewhere around 1% every year (growth of American population).