This is why in The Republic (the dramatic setting being a chance, informal discussion about justice), the ruling class was not allowed to have private property

This is why in The Republic (the dramatic setting being a chance, informal discussion about justice), the ruling class was not allowed to have private property - because it warps their judgement. What's interesting is that despite this prohibition, Socrates refuses to concede that they would not be happy, the implication being that their jobs as rulers would be sufficient. Notice how many games involve power and control. How much happier might people be, if they had some real power in decision-making in their communities!