This is extremely hand-wavy.
Can you be more concrete in what you think this looks like?
The way I see it, we're only 5-10 years away from having general purpose robots and AI that can basically do anything. If the prices for that automation is low enough, there will be massive layoffs as workers are replaced.
There's no way to "naturally" solve the problem of skyrocketing unemployment without government involvement.
You figure out your own economic security, I’ll manage mine.
Disconnecting value from productivity sounds good if you don't examine any of the consequences.
Can you build a society from scratch using that principle? If you can't then why would it work on an already built society?
Like if we're in an airplane flying, what you're saying is the equivalent getting rid of the wings because they're blocking your view. We're so high in the sky we'd have a lot of altitude to work with, right?
In this society there is literally nothing for anyone else to do. Do you think they deserve to be cut out of sharing the value generated by The Engineer and the machine, leaving them to starve? Do you think starving people tend to obey rules or are desperate people likely to smash the evil machine and kill The Engineer if The Engineer cuts them off? Or do you think in a society where work hours mean nothing for an average person a different economic system is required?
To derive an alternate system you need alternate axioms. The axioms of our liberal society are moral equality and peaceful coexistence. Among such equals, no one person, group, or majority has the right to dictate to another. What axioms do you propose that would constrain The Engineer? How would you prevent enslaving him?
Eeeeeerrrr, wrong! This is garbage hypercapitalist/libertarian ideology.
Did you earn your public school education? Did you earn your use of the sidewalk or the public parks and playgrounds? Did you earn your library card? Did you earn your citizenship or right to vote? Did you earn the state benefits you get when you are born disabled? Did you earn your mother’s love?
No, these are what we call public services, unalienable rights, and/or unconditional humanity. We don’t revolve the entire world and our entire selves solely around profit because it’s not practical and it’s empty at its core.
Arguably we still do too much profit-based society stuff in the US where things like healthcare and higher education should be guaranteed entitlements that have no need to be earned. Many other countries see these aspects of society as non-negotiable communal benefits that all should enjoy.
In this hypothetical society with The Engineer, it’s likely that The Engineer would want or need to win over the minds of their society in some way to prevent their own demise and ensure they weren’t overthrown, enslaved, or even just thought of as an evil person.
Many of my examples above like public libraries came about because gilded age titans didn’t want to die with the reputation of robber barons. Instead, they did something anti-profit and created institutions like libraries and museums.
It’s the same reason why your local university has family names on its buildings. The wealthiest people in society often want to leave a positive legacy where the alternative without philanthropy and, essentially, wealth redistribution, is that they are seen as horrible people or not remembered at all.