What is the theme in The Risk Pool by Richard Russo?

Money is at the center of many issues in Mohawk. Sam and Jenny have completely different ideas about money, and Ned seems to mostly prefer his father's view. Jenny always watches her money very carefully, as if it has magical qualities. She plans for every bill and even unexpected expenses. Jenny feels triumphant in the fact that she has nothing to worry about money-wise, but she actually worries about money all the time.