No need for humans at all in your dystopian scenario, apparently.
I cited one of a dozen sources that disagree with you about what percentage consumerism has and continues to contribute to the economy, but please feel free to call it ridiculous instead of bringing facts into the discussion. “Automation can” is not “has”, but you do you boo. Been fun, have a good one.

Even if that’s true (which it’s not), the U.S. economy is still overwhelmingly dependent on individual consumers’ expenditures — 69-70% of US GDP, 12-15% of global GDP. If executives want to sustain their ability to make profits, they need to provide workers expendable capital. Gotta feed your sheep if you want to keep fleecing. Middle and lower classes tend to spend money when they have excess. Rich people don’t. This is not sustainable.