This relates to the thread about how hard we should strive to work. The issue that was not addressed then and is being overlooked now is that some teachers go into teaching because they see it as an easy gig with good pay: people often choose jobs/careers for the pay not the intrinsic nature of the job/career. I had a high school teacher tell us that once "I really never wanted to be a teacher, but my friends were doing it and the pay looked good for the hours". If people were allowed to do what they were passionate about (unalienated) then the whole problem of underperforming or how much effort to extend to work would disappear.
Brad