For utility maximizers there is no "outweigh". There is only "better" and "worse".
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.