They're only an invention if you consider "seeking sustenance to live" not explicitly a job if there's no monthly direct deposit involved.

Indeed.

On the plus side, if there really is no value to labour, then farm work must have been fully automated along with all the other roles.

On the down side, rich elites have historically had a very hard time truly empathising with normal people and understanding their needs even when they care to attempt it, so it is very possible that a lot of people will starve in such a scenario despite the potential abundance of food.

It's either: 1) the rich voluntarily share the means of production so everyone becomes equal, 2) the poor stage successful revolutions so they gain access to the means of production and everyone becomes equal, 3) the poor starve or are otherwise eliminated, and the survivors will be equal.

All roads lead to equality when the value of labour becomes 0 due to 100% automation.

There's plenty of outcomes besides those three.

Over history, lots of underclasses have been stuck that way for multiple generations, even without the assistance of a robot workforce that can replace them economically.

Some future rich class so empowered would be quite capable of treating the poor like most today treat pets. Fed and housed, but mostly neutered and the rest going through multiple generations of selective inbreeding for traits the owners deem interesting.

Non-human pets don't have the capacity to rebel though; make humans into pets and there will again be the constant danger of rebellions as with slavery in the past. Without the economic incentive to offset.

I disagree on both counts.

On the first, non-human pets rebelling is seen every time an abused animal bites their owner.

On the second, the hypothetical required by the scenario is that AI makes all human labour redundant: that includes all security forces, but it also means the AI moving around the security bots and observing through sensors is at least as competent as every human political campaign strategist, every human propagandist, every human general, every human negotiator, and every human surveillance worker.

This is because if some AI isn't all those things and more, humans can still get employed to work those jobs.

If truly 100% automation (including infantry/police) the most likely scenario is not any if the above; most people will be kept on some kind of minimum sustenance enough to keep them from rebelling (“UBI”) and those who disagree will either be coopted into the elite or eliminated.

There's no reason to keep anyone on minimal sustenance though. They're absolutely useless alive from an economics perspective, and so would probably be better served ground up into fertilizer or some other actually useful form.

> There's no reason to keep anyone on minimal sustenance though.

No reason, except their (the rich or the AI) own personal desire to do so.

https://en.wikipedia.org/wiki/Folly

> They're absolutely useless alive from an economics perspective, and so would probably be better served ground up into fertilizer or some other actually useful form.

Indeed. "The AI does not hate you, nor does it love you, but you are made out of atoms which it can use for something else."

But while some may care about disassembling this world and all non-rich-human life on it to make a Dyson swarm of data centres, there's also the possibility each will compete for how many billions of sycophants they can get stoking their respective egos.