This question is a beautiful example of typical incentives workers feel and how screwed up they are. On HN people talk often enough about how if you have a worker who gets their job done in 30 hours instead of the company's usual 40-60 hours, you should give them 30-100% more responsibility, but much more rarely "and 30-100% more pay." Butt-in-the-chair hours are super important culturally and it's been that way for a while. Incentives are screwed up enough we're getting questions like this.
If you've ever thought "I'm done for the day, but I'm going to hang out a little longer to leave at a more respectable time," then you're feeling (and doing) the same kind of thing.
If you've ever thought "I'm done for the day, but I'm going to hang out a little longer to leave at a more respectable time," then you're feeling (and doing) the same kind of thing.