The idea is to take a stand now. If you further marginalise those that already have almost nothing, where do you think that leads to? Are you ready to step over corpses on your way to work?
Societies are a bit like networks, they're only as strong as their weakest link.
If a homeless encampment appears on a public transit mainline, should we shut down the city's transit system until poverty is eradicated worldwide?
Our civilization is certainly low, but it could fall a lot further.