Reminds me of a Dilbert comic from over a decade ago. Dilbert was working from home, and the joke was him saying something like "Do I owe my employer the full 8 hours of work or just the 2 hours of productivity I would have if I went in to the office?"
(God, I'm ashamed it took me 10 seconds to find that.) He eventually goes crazy.
Anyway, I've experienced the same in a declining company, in which people were fired or quit, and I'd get their full responsibilities, and it literally added 15 minutes of work per week to my schedule.
I would have linked to it, but I only read it in a dead-tree book at my parents' friends house a decade ago, so I had no idea where I would find it in the archives (didn't know when it was originally written). Apparently the Dilbert website has full test search for all the comics now, which would have made it a lot easier.
