Self-service checkouts

I’d just like to state my full approval of Tesco’s self-service checkouts. I scan the items, send them down the rolly thing and a staff member appears to pack the bags! By the time I’ve paid, it’s all ready to load into the trolley. I feel like I should tip them.

I know Tesco have some morally dubious business practices behind the scenes, but they do make themselves hard to dislike.