You're being confused by the numbers. We aren't trying to maximise consumer spending, the point is to maximise living standards. If the market equilibrium price of all goods was $0 consumer spending would be $0 and living standards would be off the charts. It'd be a great outcome.

It just happens that up to this point there have been things that couldn't be done by capital. Now we're entering a world where there isn't such a thing and it is unclear what that implies for the job market. But people not having jobs is hardly a bad thing as long as it isn't forced by stupid policy, ideally nobody has to work.