We feel guilty, do we not, if not busy? But we feel somewhat soiled, on the the other hand, if we sweat overmuch?
I can only suggest that we often indulge in made work, in false business, to keep from being bored. Or worse still we conceive the idea of working for money. The money becomes the object, the target, the end-all and be-all. Thus work, being important only as a means to that end, degenerates into boredom.
Can we wonder then that we hate it so?