Grapes of Wrath was as much about poverty in the depression as it was a treatise and love letter to socialism. The whole thing about workers camps and collectives, farmers offering to pay 13 cents/bushel peaches and then giving 5 cents...indentured servitude basically as many of the poor migrant families were borrowing money from the collective to pay fees and fines, etc.
Great film by John Ford but an even better book. There's a truncated BBC play (radioarchive.cc was gold) that's actually really well done; if anyone wants it I might be able to find it in my audio file archives.
Now the poor just stick their hand out and scream raysist.
Great book
Company towns comes to mind. The founding of the Knights of Columbus was rooted in Irish poverty in the 1840s. Greedy farm owners taking advantage of semi starving workers is what? A lever that forces collectivism. Yet they then hire "breakers" to enforce their actions. Read "Hard Times" by Studs Terkel to get a perspective.
In that respect it is like Sinclair's Jungle. No one really gave a fuck about his socialist BS, but everyone was like WTF about meat packing. Take from it what you will.