Maybe there is an opportunity here to somehow make shopping or self-checkout more thrilling and thus reduce shoplifting. Maybe add some features from a slot machine and give random discount or free items. Gamify the checkout experience so people want to buy more.
I've heard of a few "sticks" in the last few months that don't seem nearly as fun/customer friendly as yours: facial recognition to identify/charge thieves after the fact and AI that analyzes body language and identifies shoplifters through their (supposedly) suspicious behavior in-store.
I'd also be curious whether the "honesty eyes" concept[1] would put a meaningful dent in self-checkout shrinkage.
Certain brands of vending machines will also do a slot machine routine - the price LED display will spin numbers and if you get 4 in a row you win a second drink (I've never won)
Precise measurements are needed, this would be a cool psychology project to work on in some big chain.