Money is nothing but a bunch of IOUs to make bartering easier.

I can appreciate the spirit of this post, but it's a perspective only a teenager could hold.

This is like saying, "Why can't we all just pretend counterfeit money is real?" Sure, it sounds like a nice simple solution until suddenly everyone prints counterfeit money and expects to buy things that no one is producing now that an easier option has appeared.

Hmm, but why would a farmer provide food to people without getting anything in return? This is, assuming everyone is selfish, which is the core assumption of capitalism.