Retirement doesn't need to mean becoming idle. There are many advantages of seniors volunteering, other than the overall benefit that society gets from good deeds and activism. If you're retiring, this is the perfect opportunity to devote your time or other available resources for a cause that you care about. You're not being compensated with money, but you'll be getting something far more valuable.
Maggie Kuhn proudly refers to herself as a "little old woman", because she knows there is power and value behind this title. Mrs. Kuhn was forced into retirement at the age of 70, but, of course, she wasn't about to let that slow her down. Kuhn founded an organization called The Gray Panthers, which fights age discrimination and advocates for social and economic justice.