Aldi is the same. You look at the lines and think "Damn, Ima have to wait" Nope, those cashiers don't play, they fill the cart, then you move to the bagging area and bag it yourself. Quick and efficient.
Some years ago after yet another natural disaster I was in the Rouses in Gonzales, people were buying WAY too much stuff and had lines forever.
I finally thought, why not help? I asked the poor cashier if she wanted me to bag for her since her customers were just standing there doing nothing. (It was set up in a way that another person could bag) Everyone appreciated it.
It went much quicker and the guy behind my cart unloaded my items, and I believe started a chain reaction.
But one of the women I bagged for still just stood there, wouldn't even put the bags in her cart, I wanted to break her eggs and smash her damn bunny bread.