When it's just one though, they stand out and good management can spot them before a crisis (usually). The issue arises when you have a sea of disgruntlement, and you have to pick out the one or two who are pathological.

If we want to invoke scripture liberally, we can say that Satan was a disgruntled employee that was fired for insubordination and founded his own company starting a War for Souls.

I think there's a book where the setting is that Hell is structured like a corporation.