Can do it with tens. junter gatherers. Just need a clean and fertile world. People do what they can and cooperate. There is leadership but they still join in tasks and do things. Someone might be punished but they likely have to do some pretty bad trump. Someone who is lazy is just called lazy and maybe made fun of. Sorta like at work places. The lazy guy does not get paid less he just is kinda a joke. No mechanisms needed at all. Tech level does not really matter.