Of course, there are some bosses that inadvertently TRAIN their guys to milk a job, when they assign a job that could be done in four hours by any reasonable tech, and then they assign it to a tech as his full day's work. I'm a guy that likes to fly though the day on afterburners, getting 10 hours work done in 8, but there has to be that work being assigned. For example, I was assigned NOTHING today, which is why I may have to move out to KC and work with Frank. He works for a great Co and has a great boss, and I've talked to that boss on the phone. Right now, I'm assembling recommendations from some clients for him. So, I do agree with being irritated when guys "dog" a job, especially when I have to take up their slack!!
By the way, if this is a fuzzy brain day, let me tell you that it does not show in your post. I had no trouble getting it.