Some San Fran accountant with no girlfriend one year got a real bug up his as$ and did some rigorous investigating:
Video showed one Chinese BART (San Fran train) sweep-up worker would come into work at 6 am, then stay EVERY day at work, including weekends, until 10 pm or so —mmmmassive overtime.
The custodian was getting something over $300,000 per year:
The guy would disappear into a utility closet (which turned out to have internet) and simply staying there, never coming out at all.
Great scam; he performed NO work, and no one was checking.
I was at a government site and tried for two days to get on-site, but needed the approval of the project manager. We had arranged to meet at a certain time, but he wasn’t there.
On the third day we camped at his office door early in the morning and caught him as he was going into his office. He signed the paper and we went on our way.
Turned out this manager would show up at his government job early, turn on his light and his computer - then tell his secretary he had to run out to a meeting.
He would then come back at 5:30 pm, turn off his computer and lights and go home. He was working a private job for a government contractor the next city over.
And EVERYBODY knew it!
I was young at the time. If it was me now I would be calling somebody!