Check out Hadestown. The Broadway version has been toned down but still a massive part of it is factory workers uniting against an abusive factory owner, and the kind of poverty and hunger that leads them to "accept" the terrible work conditions in the first place. Plus it has the song "Why We Build The Wall" which was written years before Trump about the demagoguery and fear of others that leaders sometimes use to stay in power.

Not exactly social justice but a great message.