One area were overworking is very common practice is academia. There is no time tracking at most German universities (interestingly, universities of applied sciences seem to have them). It would actually be a pretty huge shift in the academic workspace if time tracking was mandatory. I suspect that most research faculty easily work 50% or more on top of their regular load without pay. Especially in fields where it's common practice to hand out 20h/week positions with the implied expectation that you put in a full week workload.