> How do you run a society based on who is dissatisfied?
We already do. Most of what governments do is reactionary to dissatisfaction.
> then changing laws because those people are "dissatisfied" seems kind of arbitrary
It's the opposite of arbitrary. Governments generally rule via power invested in them by the populace. Doing things that alleviate dissatisfaction is a survival tactic.
> dissatisfaction is kind of the human condition.
This is why building a rational and cooperative society is important, because they are the cure for misplaced dissatisfaction. That being said, historically, governments aren't stable, and that is, in large part, due to some of your points.