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Achieving post-scarcity in a world of finite resources

The most common response to "AI took my job" is "don't worry, soon the AI will take everyone's jobs, then we'll all have UBI and we won't have to work anymore." The basic thesis is that after the advent of AGI, we will enter a post-scarcity era. But, we still have to deal with the fact that we live on a planet with a finite amount of space and a finite number of physical resources, so it's hard to see how we could ever get to true post-scarcity. Why don't more people bring this up? Has anyone written about this before?

Let's say we're living in the post-scarcity era and I want a Playstation 5. Machines do all the work now, so it should be a simple matter of going to the nearest AI terminal and asking it to whip me up a Playstation 5, right? But what if I ask for BB(15) Playstation 5's? That's going to be a problem, because the machine could work until the heat death of the universe and still not complete the request. I don't even have to ask for an impossibly large number - I could just ask for a smaller but still very large number, one that is in principle achievable but will tie up most of the earth's manufacturing capacity for several decades. Obviously, if there are no limits on what a person can ask for, then the system will be highly vulnerable to abuse from bad actors who just want to watch the world burn. Even disregarding malicious attacks, the abundance of free goods will encourage people to reproduce more, which will put more and more strain on the planet's ability to provide.

This leads us into the idea that a sort of command economy will be required - post-scarcity with an asterisk. Yes, you don't have to work anymore, but in exchange, there will have to be a centralized authority that will set rules on what you can get, and in what amounts, and when. Historically, command economies haven't worked out too well. They're ripe for political abuse and tend to serve the interests of the people who actually get to issue the commands.

I suppose the response to this is that the AI will decide how to allocate resources to everyone. Its decisions will be final and non-negotiable, and we will have to trust that it is wise and ethical. I'm not actually sure if such a thing is possible, though. Global resource distribution may simply remain a computationally intractable problem into the far future, in which case we would end up with a hybrid system where we would still have humans at the top, distributing the spoils of AI labor to the unwashed masses. I'm not sure if this is better or worse than a system where the AI was the sole arbiter of all decisions. I would prefer not to live in either world.

I don't put much stock in the idea that a superhuman AI will figure out how to permanently solve all problems of resource scarcity. No matter how smart it is, there are still physical limitations that can't be ignored.

TL;DR the singularity is more likely to produce the WEF vision of living in ze pod and eating ze bugs, rather than whatever prosaic Garden of Eden you're imagining.

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This leads us into the idea that a sort of command economy will be required

Not at all, there are many schemes that can work around this, look at crypto for innovations. I'd imagine something like a queue that takes size and priority into account. You'd be allocated a certain amount of "ai time" per day as a birthright and allowed to spend it as you will. A hot meal at a terminal specialized to produce hot meals would cost no or nearly no 'ai time' credits to have out nearly immediately. A spaceship that takes significant time and resources to produce would cost an appropriate amount of 'ai time' credits. For larger joint efforts many people could pool their credits in a perfectly democratic way, you'd allocate your credits to things you want. If it would take an infinite time to produce some thing it would have an infinite cost and you wouldn't be able to order it.

Now the harder problem isn't a troll ordering something composed of more matter than exists in the universe but genuinely ultra scarce things. Only one person can own and have the genuine first ever Elvis outfit. Only so many people can physically live in a single family home on long island. This type of monopoly is much more difficult to solve and causes problems in the real world.

I have this sort of arrangement would devolve into complete hell very fast.

If not money, then influence. Hence everything would get incredibly politicised partly because it'd be the only way of getting influence and partly because people wouldn't have much to do.

I think you could describe our current system as having much the same failure modes. I contest that there won't be much to do.