Yeah, this is a great way to look at it; food scraps, shredded paper, and neglect.My approach is a little different. I buy nothing to feed my worms. I feed them scraps: vegetables, fruit, lots of coffee grounds, egg shells. etc. I use shredded paper for bedding (best way to total destroy documents). My worm castings are beautiful. I have a local worm farm I can buy good castings $.50 a lb. Before I would spend much on feeding worms I'd buy the castings. Worms will produce great castings from your real food scraps, not leftovers from McD's but real food.