So really the only legit reason is "I want to police my people" and "I want my co workers to be policed."
It's also because of the sunk cost fallacy of their investments in the expensive office, which cannot be justified if people are not working there.
Funny, I saw this on eBay a while ago:
It's also because of the sunk cost fallacy of their investments in the expensive office, which cannot be justified if people are not working there.