Shops are making extremely feeble efforts to curtail theft such that I think it's a nice cover for raising prices, slashing costs and increasing data capitalism etc
For example at a local Asda, an expensive donut brand are placed right by the entrance. I see people stealing them all the time. At Gregg's bakery, many popular items are left on a table half way to the door, almost inviting theft. Other expensive items are put in the chiller/hot cabinet open to all.
It's been so obvious what changes need to be made, you ask yourself why they have not
If you have decent social nets you don't need to worry about theft of basic items. If people stealing food is such a big problem, your country is fucked up in a bad way.
Here they don't even watch the self checkout, and don't use those annoying checkouts with a scale.
Sales from impulse buys of expensive high-margin items are enough to offset the losses from theft.