More than once I've had my line managers saying things like "You still have 20 days of holidays to take, and only three more months to take them in", forcing me to book a week here, a long weekend there, etc, because even with my opting out of Working Time Directive limitations[1] there was always something interesting to do.
In hindsight, I was probably overcommitting, and the number of times I planned a (forced, but flexibly so) week off to put me in the vicinity of a tech event, or sat at home cultivating something I would normally have done at work[2], but I was never forced into nigh-on indentured servitude like I've seen others, with an emphasis on those from The Land Of The Free. (Not as in Beer, and apparently not actually always as in Speech, despite everything.)
I'm not saying it works right, over here, just giving my own experiences. I've had good luck and bad luck in employment/otherwise, but that part was more than beneficial.
And seemed to work for the corporation too (in at least one case, a US-based multinational that still enjoyed the benefit of a whole set of UK offices).
[1] I was on a partial or whole support-side job and I didn't have to be forced to do that, I lived for those times that it was me coming into work at 6AM and staying until midnight (
sans mealbreaks, but often at the oddest of times) that truly helped against the latest email worm, ISDN dropout or database repair that needed doing. Sometimes it'd convert into TOIL, i.e. "Time Off In Leiu" - yet another darn 'vacation day' to add to my unused quota! I think I underreported my timesheets a bit, to avoid that.
[2] To be fair, I did that the other way round, too, but luckily some of my hobbies
looked a lot like my work, and I could have argued value to them if presssed. Maybe not the MUDding.