Near 100% of my food come from producers not one of the 7. I live in Los Angeles, so that might be a good explanation. But then, how would you economically produce and distribute food to people in more rural locales, if not for some consolidation? The question of course is what is a reasonable number - is it 7? Or 20? There's no objective answer etched into a tablet somewhere. Instead, dynamic social forces produce an outcome.