There was a time when food was dear. During the depression, my grandmother was known as "Stretchy Auntie Agnes". A lot of mouths, not much food. Whoever came, she fed them somehow.
In the first world today, food is amazingly cheap, abundant, and varied. You'll pay a little more for fresh everything, but not that much. You'll get creepy chemicals in easy prep food, but it sure is easy (yes, I do that quite a bit. It gives me a lovely, chemical glow).
It's interesting that the American corn crop...the greatest crop in the history of the world...isn't used much for direct food. Animal feel and fuel production is the main use.