Previously I had mentioned the TV show Restaurant Impossible where the mission is to save a failing restaurant. Last night I caught a show that does the same thing but goes into a bar with the same intent. It was amazing to see them do a "pour analysis" of drinks served by the group of bartenders. This show uses hidden cameras to evaluate staff. Liquor loss just by a  bartender not pouring correctly was substantial but much of the loss was bartenders over pouring drinks to get higher tips or giving free drinks for various reasons with no accountability. The owner was startled to find that one of his bartenders was making more money than he in a night. She career adjusted  herself on the spot by walking out.  I am not suggesting that happens in OPA world but it did show how important controls are in a business that has a bar.