A significant percentage of work is useless expenditure on behalf of the idea of productivity.
It normalizes a frenzied insistence on being perpetually busy so as to:
1. Keep people constantly in motion which ensures that they are forcibly plugged into the capitalist circulation of labor/commodities
2. Reify the ideology of productivity itself as being seminal to a worthwhile life
3. Demonize laziness and sow discord between members of the working class