Final answer:
Steinbeck is criticizing the lack of care given to farm workers who help make the region rich.
Step-by-step explanation:
In the given quote from Steinbeck, he is comparing the treatment of farm horses to the treatment of the men and women who work the land. The horse needs to be fed even when it's not working in order to survive, and Steinbeck questions why we don't provide the same care for the people who help make the region rich. He suggests that the state is foolish, cruel, and greedy for not ensuring that the workers are provided with basic necessities like food and clothing.