The farmers need motivation for their job, just because it feeds people doesn't really cut it if they don't have a gun pointing at their head.
If it wasn't for money, they would trade something else or didn't give out food for everyone. If people had to do their job for the sheer joy, we wouldn't have people doing all the shitty jobs that need to be done to keep this place running.
Sounds like a dribble from 5 year old communist planning an utopia. It just doesn't work, I'm sorry.
Money creates equality, it doesn't destroy it. If you don't have money, well, hard shit, do something!