Having worked with government agencies, I can attest that the total lack of oversight invites corruption.
Many government jobs start with a low wage then include such responsibilities as staff meetings, record keeping, etc. as required-but-unpaid-for activities. As a result, some people begin resenting their jobs. From there it is a small step to seeing just what they can get away with.
As I've alluded to in previous posts, I've worked with some folks who've run afoul of the law in this and other ways.
Now, the FBI is focusing more and more on people who illegally dip into the till. Good luck to them. Given the numbers of government employees in this country, they've got their work cut out for them.
Here is the entire article.
Interestingly, a Senator [and a Democrat, at that] is calling on the FBI to redirect its energies toward violent crime rather than focusing on corruption. I disagree. Both are serious and need to be addressed.