Because of similar reasons, people whose material needs are covered may act to improve the status of those who do not share their prosperity.
I think this speaks to the divide we often see between empathetic people vs. non-empathetic people. We often see wealthy people who are raised to believe that the world revolves around them, and that breeds apathy. It's important now more than ever to value the wellness of every person, black or white, gay or straight, rich or poor, immigrant or citizen. If people don't understand that everyone getting their needs met leads to a greater outcome for all, the ultra-wealthy will continue to accumulate wealth, and everyone below them will fall further and further into oppression. You don't need firsthand experience to be empathetic to those who are disadvantaged, you just need enough common sense to know it's them today but could be you tomorrow.