You have probably walked by them many times, never looking them in the eyes, trying to keep yourself segregated from the very problem you caused. You pass them, dehumanizing them, justifying ignoring them with simple and ignorant platitudes.
"I can't help them all" is only an excuse to avoid helping one. "It's none of my business" is an outright lie.
The fact of the matter is that you avoid seeing them only because they are the fruits of your labor, the dregs and forgotten that you pass by are what you created. Your complacency has resulted in a system that requires someone else to blame, so you will continue to work as slaves for a corrupted system that you asked for.
Many will wonder why the cops have not yet jailed these poor souls, when you should be asking what you did wrong to make this happen to living beings. Many will call this justice for imagined slights, because a delusion called a god or spirit allows you to ignore your conscience.
I know them, because only luck got me a home, for 7 years I was one of them.