I think people's imaginations are overfitting on current reality or the past 20 years where people's vision of technology is something like Facebook (a multibillion dollar college yearbook app) or Netflix (TV, but on the internet), and the economy needs a horde of subscriber consumers binging on a buffet of digital mind slop to keep the whole system running.

The (sad fucked up) reality is that Joe Schmo consumer never had most of the wealth in the first place. Not since the 1970s at least.

Just like Nvidia makes a lot more money selling GPUs to megacorps rather than to people playing games on their XBox, future corps can make plenty of money serving each other rather than retail consumers.

An autonomous fleet of delivery vehicles needs an autonomous fleet of vehicle service robots, etc, etc. At some point the entire stack will be automated.

Will the working classes be at the bottom of the pyramid and wealth inequality skyrocket. Absolutely. It's practically inevitable. But will the economy collapse? No way.

Just like how DOOM used to require a luxury scale $5,000 home PC to run and now the same level of compute can be found on disposable vape pens, at some point armies of robot servants built by the "tech companies" will be integrated into every facet of human life, from the lowest plebians to the wealthiest patricians.