"I know all the people who work in these supermarkets." Perhaps not. I worked at a supermarket as a starving student decades ago and the number of non-cashier

"I know all the people who work in these supermarkets." Perhaps not. I worked at a supermarket as a starving student decades ago and the number of non-cashier employees dwarfed the number of cashiers. Most of the people in a store at any given time are stocking a department or cleaning or providing counter service or rather optimistically all three. We had more people employed at 3am stocking shelves and scrubbing floors than employed serving customers during 2nd shift... There is an assumption in the comments, that might come from confusing urban convenience stores with supermarkets, that the only employee in a supermarket is the cashier. You could make something like a quik-trip gas station/convenience store almost staff-less, but an actual supermarket is crawling with non-cash-handling employees.