If I did this even once in a private, in any way what so ever, where I work, I would be fired the same day with no fanfare or explanation. I would show up to work, HR would meet me in the parking lot with a box of the stuff in my desk, and that would be that.
In the 'real world' this is called 'theft' and abuse of privileges. In government, it is called 'Tuesday'.
Having worked in government for a while, I can tell you what this is all about. Not one person will call attention to another person abusing government money for two reasons.
First, they all do it, so outing someone else will draw attention to your own issues.
Second, you never know how and who the person doing the abuse is connected. You could 'out' an intern, for example, for abuse of privilege and then get an email from his uncle, "the Senator".
That stuff happens all the time. Government, because it is so incredibly crazy lucrative, and crazy easy, it is very, very, incestuous. You never know, no matter who the employee is, who it is that you are dealing with or who they know and how they are connected.
This tends to keep everyone's mouth shut no matter what.