There’s a bit more to it than that for a lot of people.
That is the problem with statistics, it only gives part of the picture. I was unable to give overtime without going through a multi day process, but many times we had a problem pop-up. All of those on salary worked some extremely long hours to meet mission, but I did not track their hours, so if the work load was light and they missed a morning, why should I care.
My hourly workers got comp time (unofficial but common knowledge), and they would work an extra 30 minutes or so, knowing that if they needed to leave early for an event it was easy to get permission- "a nod of a head." And most times when a problem popped up, 30 minutes or work after work today saved an hour the next day.
Don't get me wrong, we had an ever increasing workload where employee increases lagged behind workload, but we all knew that if you needed time off, it would be given. Our employee turnover was extremely low, which made life much easier. However, if you looked at the official labor logs, we all worked pretty much 40 hours per week minus standard time off rules.