Japanese too. Keep in mind that this article is written from a British/European standpoint, where working overtime is an exception, not the norm.
The author was relating an experience in which the secretary would do this little fake jog thing to wherever she was going. It wasn't any faster than walking and he asked her why she just didn't walk. She said that she didn't want to seem like she was slacking.
I have also heard that for a Pit Deputy (deep coal mining) the going rate for a single weekend 10 hour shift is £2k.
Mandatory overtime as a concept is contradictory, that's just the new work-hours.