Fact but it does not negate that physically present employees deters some crime.
High traffic grocery stores who put in self check outs are staffing several guards now and put in some clown fences and gates...
But hey guy who put in self check and guy fired cashiers both got bonus...
Guy hiring security and putting fences also got bonus. These clowns will pay anyone any amount of money as long they don't pay the worker for the actual job.