What do the Joads learn about the handbills when they talk to the ragged man at the campsite?

A ragged man at the camp, when he hears that the Joads are going to pick oranges in California, laughs. The man, who is returning from California, tells how the handbills are a fraud. They ask for eight hundred people, but get several thousand people who want to work. This drives down wages. The proprietor of the campground suspects that the ragged man is trying to stir up trouble for labor.