Answer: Egalitarian
Step-by-step explanation:
From the question, we are informed that Anthony and Cathy Smith have been married for thirty-one years and that they have always had a joint bank account, discussed big expenditures, and shared household duties.
The term that can be used to describe them is egalitarian. Egalitarian is a principle which believes that everyone is equal and everybody deserve a equal opportunity and has an equal right.