Aldi used to have fairly skilled labor and no barcodes. Seriously. Every cashier previously worked as a stocker until he learned all of the three-digit codes for all of the products in the store. Then as a cashier nothing was scanned, instead the cashier very quickly typed in the three digit code for everything as he pulled it across. A good cashier was faster than a scanner, as he could type in the codes for items all the way back on the belt before they got to him, shoving items by in bulk.
They were, also, paid accordingly well.
“Ergonomic standards for cashiers were proposed by OSHA some years ago. I think they were overruled by George W.”
They were not ergonomic standards, it was the trial lawyer full employment act.