-- " It's not me. There's nothing i can do. I'll lose my job if i don't do it. And look- suppose you kill me? They'll just hang you, but long before you're hung there'll be another guy on the tractor , and he'll bump the house down. You're not killing the right guy." pg. 38

This passage illustrates how corrupt the controlling corporate system was. In this case, the people had no power to do anything against them. The tractor driver, therefore, gives the farmer a justifiable explanation for why killing him would be a complete mistake.