Isn't this exactly what was exposed at the Amazon "Just Walk Out" stores? Turns out all the cameras and sensors weren't good enough, so they paid thousands of people in India to watch videos and correct checkouts. They basically just outsourced the position of cashier, while pretending it was all done automatically!
https://gizmodo.com/amazon-reportedly-ditches-just-walk-out-grocery-stores-1851381116



