Capitalism loves exhaustion. If they can't break your will to fight, they'll try to sap all your energy to fight. "Productivity" isn't the real reason capitalists impose long hours, punishing commutes, and paltry PTO. They've seen the data that proves burnout decreases productivity. They just know that, like worker despair, worker exhaustion is a key bulwark of the status quo.
And then they sell the workforce a bunch of meds and stimulants so they can keep working when broken inside.