I could afford a house, sure. In the boonies. Could I afford to buy the NYC apartment I live in? No chance.
I mean, it is a little weird because compensation these days usually includes stock, so, some ownership of the company. But not much real decision making power beyond the limited-scope decisions around we implement their will.
Maybe a consultant could be considered like a vassal?
(More seriously though: the real challenge to this approach is that cloud compute resources are a game changer and they can be at best approximated with the high-latency connections of hundreds of distributed users. The problem to solve goes a bit past "everyone should host their own email..." And even that is a tall order if you want your email to actually be sent and received and to not drown in spam).