Is it supposed to? It's a cost benefit analysis - do they save money by investing in all the tech? Or is it cheaper to use honor system with little to no invest

Is it supposed to? It's a cost benefit analysis - do they save money by investing in all the tech? Or is it cheaper to use honor system with little to no investment to do so? Given there's always bad actors all the time, there's some minimum of loss from theft that always exists.