He might not be doing it for economic reasons. He might be doing it to get out of the house. My mom's physician suggested volunteer work or a part time job to keep her active instead of sitting on the couch all day.

Most likely he is doing it for economic reasons. My preferred checker is an elderly woman that is slow, but very affable and likes to chat when there is no line.

Despite her positive attitude, she is working because social security isn't enough and grocery workers also get an employee discount.

Not sure if you're joking, but volunteer work is quite different than having to stand at the checkout line packing backs in a commercial setting.