Families have a rough time getting their children the nutritional food they need. I often see them going to fast food restaurants to buy cheaper food. That 1$ happy meal at mcdonalds is cheaper than buying apples at a local grocery store (it is where I am). If the right type of farms are funded more than that of the unwanted foods, the more nutritional choices should come in lower prices.
I just know some general economics. I also know that if your going to start somewhere, start with food.