I had that job in high school. When I first started, someone who’d been doing it for years was showing me the ropes, and he pointed out that sometimes people who live nearby the store would just walk to the store, then walk home with the cart, and leave it at the apartment complex, so he would (and thereby I should) periodically walk down there to collect them.

I initially thought this was complete BS and I hated that I was being asked to do it. After the first week or so, I realized what was actually up: He was inviting me to take paid breaks every hour or two, during which I got to take a leisurely 20 minute walk down the street and back, and not have to deal with customers or managers or anyone else, and he’d managed to sell this to management as a benefit to the company. He was an awesome co worker.