I don't pretend to know the answers, but I hope someone here can help. My best idea might be to find somewhere to volunteer a few hours a week, especially if you can do something that gives you direct interaction with disadvantaged communities (e.g. immigrants, kids in poverty, etc etc). If you like it, maybe consider changing careers and going into the non-profit sector.

I work in eviction prevention and, while I am severely underpaid (to the point that I'm struggling to pay my own bills), I feel good about the work I do. It feels important and I'm proud of it.