Do you really think that people are so inept as to not be able to grow tomatoes, beans, or lettuce in their own yard? We certainly grew our own where I was raised. It's a bit of work here and there, but it certainly isn't rocket science.
No kidding. We lived just outside of Pittsburgh for a couple of years, and all we had was a patio, and some containers. In the house, we also had a lovely lettuce garden year round, in pots in the kitchen window. Lettuce plants are very decorative, if well-kept.
But I like the idea of the victory garden best. We had some in our neighborhood where I grew up in the 40s and 50s. They were really great!
How many people do you think have a yard big enough to grow produce? Did you ever hear about people living in condos?