Taxes are unpopular. The policy of Enough can be done voluntarily. In fact, I've toyed with the idea of starting a company who's employment agreement requires agreeing to the conditions of Enough. I think it would even be useful for individuals, in private, to consider what their own Enough number is.

Also, taxes don't try to curb unbounded greed and growth. The Enough policy acknowledges unbounded growth is actually the biggest problem.