In this case "outweigh" is relevant. If your altruistic activities don't outweigh the impact of your taxes, your EA move is to live off-the-grid (assuming we've simplified down to those two factors, and neglecting tax avoidance methods).
You can easily control your earnings on the downside, is the point.
You know the drill - If it's worth saying, but not worth its own post (even in Discussion), then it goes here.