Interesting argument. Yes, it would be helpful to look at pre-capitalist societies to understand how people managed to live without their vocational incomes being defined as their primary raison d'etre for living.

But if we take your argument further, wouldnt these "Owners" just lawyer up and prevent their market advantages from being diluted? Societies can have massive income inequality and still exist; we've been doing it for melania. Economists couldn't even pass the Tobin Tax on financial speculation, how can you have any faith that something much more substantial could now have any chance of being instituted?