How hard you work is relative right?
I mean a manual labourer might not be so fit and strong but be working at his limit each day but still under performing when compared to someone else stronger.
On the other hand a desk worker might work 10 hours doing the best he can but still not produce the results that his uncommonly bright colleague can do in less hours whilst also spending time arguing on STW?
So how much do we reward the subjective effort put in or do we should we just care about the output?