So essentially the former -- you will only do this if everybody else is forced to. Which in itself is selfish, and against the greater good. The marginal util

So essentially the former -- you will only do this if everybody else is forced to. Which in itself is selfish, and against the greater good. The marginal utility of $1 for someone in poverty vastly outweighs the benefit you will get from it. So you don't need to wait for anything to pass a vote or become popular opinion to selflessly advance the greater good. I know of very few socialists who take advantage of this opportunity, unfortunately.