Judging from my recent experiences with retail, I’d say they all could stand to staff more cashiers. It was once unusual to be backed up in a line at the grocery store or dollar store, now it’s every time I go. If they offer self-checkout, I’ll use it in the event of a line, but most of them don’t.
The local Walmart grocery has lines at the self-checkout during peak hours. Since self checkout can only be done one item at a time, while the cashier can do multiples, there are times when the cashier lines are a better bet than the self checkout.
And if the machine malfunctions (unexpected item in the bagging area - put item in bagging area on a continuous cycle as you move the item on and off the table), the cashier line is a sure bet. Just make sure they don’t rotate a bag away from you while you are picking them up.
I worked in a supermarket in the early 80’s.
One of the main attractions of that job to me was the large number of female cashiers 18-23 who were working there.
I think we had 15 registers. At least 12 were nearly always open. Pretty much they all had baggers, and there were guys out stocking the shelves as well.
I was in that same store two months ago, and counted nine employees in the whole building, including the manager.