I did the audit by making every manager certify a list of employees. I found two employees that none claimed. One dude was well known within the plant and fixed any broken motors. No one had heard of the other guy. I convinced the payroll clerk to just stop paying the other person. He got pissed, and eventually tried to get a union rep, but the union decided not to rep him.
It turns out this "ghost employee" had collected over a million dollars in salary and OT, yet not worked in about a decade.
I asked about an award for the savings, but I was shot down because the union didn't want to let it out that they didn't rep a guy, and the company didn't want it known the ghost employee audits weren't actually being done.
In the end, I realized I was rearranging the deck chairs on the titanic, and switched careers by becoming a programmer. Haven't looked back since.