When I was a teenager, jobs were scarce because every teen was trying to get one, and there were millions of us. Every fast food joint had them, practically all teenagers and an adult supervisor and a manager.
Now You see mainly middle aged and elderly people, no teens.
I like within walking distance to Burger King, Wendy’s and an Arby’s and they all have adult crews..........
I couldn’t tell you who works at the fast food joints here in my little town, because I never use them. I can tell you who works at the grocery stores though. Some are teens, and there’s good assortment of ages for cashiers. The managers are pretty varied in age.
Unless your state had different laws for fast food workers, you weren’t being paid the minimum wage in 1971. I went ahead and looked up minimum wages from years ago. I was five cents off on my earlier guess.