What could Asda and Morrisons move away from self-checkout mean?

Getty ImagesSome supermarket chains have said they are refocusing on staffed checkoutsAfter years of encouraging shoppers to scan their own groceries, some supermarkets are checking out a move back to traditional tills.Asda said it would put more staff on checkouts, while Morrisons admitted it might have "gone too far" with self-scan. Northern upmarket chain Booths has got rid of them altogether.The dreaded…