The same they do with us with coffee. If everything that is taken away, without permission, is calculated the amount of money that's lost will for sure be shocking and more employers ask themselves if it's worth to start a business or wiser to invest.
It's exhausting to put up with people especially if you have to check every step you take which makes one realize that no matter how fat the paycheck is, it's for the most never enough. Ask hotels how many soaps, shampoo, towels, pens, and so on have disappeared.