Then perhaps the more accurate statement would be that food would be all they'd be able to afford. At that point, options are really, really cheap (and incredibly toxic) fast food, or buying some sort of staple in bulk like rice or grains. And if you don't have a roof over your head, it won't do you much good to spend 2/3rds of your monthly salary on a big bag of rice from Costco.

Even with government subsidized corn, its still not cheap enough. I suppose if we round them all up like we did in the 18th century we could manage it. Put their children to work too. Make them slaves in everything but name. Yes, this is what the founding fathers meant by freedom!