In the book Of Mice and Men there are several areas that could be considered validation about the men's low income status. In the beginning the men are on foot. They had been riding a bus but it would not go to the gate of the ranch. They have to walk four miles to get to it. The paths have been beaten down by tramps. Their food supply is limited.
George undid his bundle and brought out three cans of beans. (10)
After George realizes that Lenny is going to be killed because he had killed Curley's wife he begins to think of what his life without Lenny will be like. He tells Candy.
I'll work a month an' I'll take my fifty bucks an I'll stay all night in some lousy cat house. (95)
George tells Lenny at the river before he shoots him:
Guys like us got no family. They make a little stake an then they blow it in. (104)