Well. I remember a time, when every store in my country had a shop-keeper, that would hand you the goods over the counter. Usualy shop had one shopkeeper that t

Well. I remember a time, when every store in my country had a shop-keeper, that would hand you the goods over the counter. Usualy shop had one shopkeeper that tended to all of the shop (counter, refilling, e.t.c) Then somebody figured out, that if you introduce a one way door in, and one way out, you can have larger store tended by much smaller number of people. And now in some shops they replace three counters that had to have people with ten self-checkout counters and one guy doing oversight ...