Even shops with security guards dont work in the UK at the moment. It's a shame this could never be a thing here.
As a counter point, when I came to UK, it was super weird to see self checkout machines. Where I am from (Pakistan), I can't imagine anything like that. Although watched a video recently where in a rural area a guy left a cart of fruits on the side of road for people to buy the fruits and pay by themselves, at the end of the day cash was just little bit less than total amount. These machines in UK felt like I was bei…
The system will also typically signal for an attendant if you after a short amount of time ensures the weight on the receiving end matches the expected weight of the items scanned so far.
There's not all that much trust involved in it, and I think just being aware of the cameras will make most people who might be tempted think twice.
Of course it's possible to steal still, but it doesn't need to be perfect, it just needs the shrinkage to add up to a lower cost than having more people at the tills.