I read this on the Trenches webcomic website, and it's such a simple and excellent story that I just had to share it with you.
We used to have someone who would buy cans of Coke bulk and keep them in the fridge, selling them and donating the proceeds to charity. It relied on the honor system to leave money for them, but over time, the money wasn’t matching the missing cans…by a significant margin.
People started to get into heated arguments about it, with accusations flying left and right and emails questioning “What kind of people work here?!”
Finally, after much discussion, a webcam was set up to keep an eye on it. Many thought it signaled the end of our company culture and an absolute loss of faith in who we thought were our friends and coworkers.
The next day we fired the cleaners for stealing the money and drinking the Coke.