What stops the inspector from turning a blind eye to app-based tickets? If you want a true technological dystopia solution then the train car should be enginee

What stops the inspector from turning a blind eye to app-based tickets? If you want a true technological dystopia solution then the train car should be engineered in a way that nobody gets in or out of the car without a valid ticket. Like, make entrances a double-door, then you gotta swipe your ticket to board, deboard, go between cars while enroute, etc.