I’ve been told the wide substitution of any type of worker is not economically sustainable for the elite.
I don’t think economical sustainability has ever stopped any industrial revolution.
If the elite owns, at its own discretion: energy, materials, transformation plants, scientific knowledge, a military, and workforce; then finance is not needed, not as instrument of dominion, not as instrument of personal gain, and not as an instrument of competition. Some call this “techno-feudalism”.
Elites strive to render subjects superfluous and instrumental to their ends: they are the kings, the gods, the aliens, the superior race, the owners. We are the subjects, the disciples, the cattle, the inferior, the slaves.
It has always been the case, and every time the elite gets eaten, submission into slavery starts again.
We could be hungrier than this.