The capitalists know full well we're more productive working remotely, but their need for control has proven to be stronger than their insatiable greed anyway.
Just more proof that cruelty is the point. They've known since the 70s that they'd be richer than they are if they would pay thriving wages and eliminate poverty. They want the suffering more than the money.
They would be richer, but by "allowing" working class people to have a thriving life means the power gap between us and them wouldn't be as big. People could organize and overthrow them, so they have to keep us fighting amongst ourselves for scraps.