This is what I sometimes claim my development economics is all about. But trying to know the objective function I'm trying to (or should be) maximize is difficult. Shouldn't climate change be part of it, especially if life on planet Earth is at stake? Should my own happiness, which really wouldn't be maximized by working on Wall Street? Couldn't you be more effective in the long run by encouraging a bunch of others to do the "best" thing instead of actually doing that "best" thing yourself? Hard to say.
h/t for the seriously thought-provoking and interesting article: Blattman.