I've seen both responses from people I know. One person has always been a bit of a workaholic, and used work as sort of a coping mechanism for anxiety. As one might imagine, they started working much much longer hours. Another person I know got in the habit of working from about 10 to 3 or so, to the point where I was worried for their job. I think the lesson is that people's relationship with work is just a highly individual, and people will have very divergent outcomes.
Both of those are rational responses to the modern work culture.
The two extremes are:
1. Working as hard as possible to get a promotion over the next person working as hard as possible.
2. Doing the bare minimum to not get fired.
Anything in between is, logically, irrational, because you're doing more work than necessary.
Luckily, companies have found the levers for most humans and tend to get them working in between the two extremes.
