it is power itself, and the effects of power, that make people stupid and irresponsible.
I read it as; most people are negatively affected on both sides of power imbalances. The natural answer to this is to attempt to remove power imbalances.
In the context of decision making, no matter if you think humans are inherently goody two shoes or not; most people respond well to increased responsibility. More democratised decision making and ownership in a community creates a positive feedback loop. An easy to understand example is in a company a flat bonus for meeting your target gives no motivation to a worker after they meet that target compared to worker coops splitting profits evenly between all workers because they share ownership of the company.