Power
Have you ever seen what happens to someone after eating a bad piece of meat? Then you know the kind of power you hold in your hands. Every decision you make can directly affect the health of your customers. Not only are you the meat keeper, you're the gate keeper. It's in your power to make sure that not even a single poor cut of meat makes it to your case.
That kind of power in the food industry can go to one's head (remember this guy?). Luckily, your customers will always be available to help you keep your ego in check. Especially that one lady who always insists you gave her the wrong change and makes you count it back to her twice.