Reminds me of Grampa Simpson working at Krusty Burger...
"and another thing, I never once washed my hands after using the restroom. That's your policy, not mine!"
One thing to keep in context here is that a hell of a lot of retirees take (or at least used to take) jobs at McDonald's and Walmart (greeters) not
because they needed the cash but because they are looking for something to do, interaction with other people, and even a desire to feel as relevant as
they did when they were working in their previous careers. It can't be easy for a man to work for 40 years of his life and then suddenly feel like
there's no place for him because he's retired with nothing to do.
Personally, I'll end up spending those years on some lake or river with a tackle box next to me or up on some mountain with a rifle in my hand... but
for a number of people that type of activity isn't something they want to do outside of an occassional diversion, so they head back to work.