When I was young and unversed in the economic ways of the world, I temped for an office that was in the middle of a cost-cutting drive. One of the ways it decided to cut down on costs was to strictly control access to office products. For example, you were issued a single pen, and to get another one, you had to turn in the previous pen you'd used up.
You can imagine what happened next. Or if you can't, I wrote it up a few years ago: