The different work requirement for officers vs. enlisted personnel was a key part of a (fictional) WW2 movie: The Bridge on the River Kwai.
Starting at about 45 seconds into this clip (with the word "officers" a bit garbled):
The British commander objects, quoting the "other than officers" portion of the Geneva Convention. Neither wants to give in.
Lots more at filmsite ... though the quotes don't seem to match the film.