Nope, you have a fundamental misunderstanding of economics.
Thought Experiment : Let's say the world unemployment is 25% and we can build a magical nuclear reactor that produces near infinite clean energy, but it costs $50 Trillion to build.
Are you going to wait for the world to save $50 Trillion (which may take 50 years) to build this reactor or are you going to print $50 Trillion give those 25% jobs in creating the nuclear reactor?
The only precious commodity in the universe is time. If you don't print $50 T, you are wasting the time of 25% unemployed people.
We don't have 25% unemployment among those able to build AI hardware. We don't have 25% unemployment among those able to grow pure silicon crystals, or able to create semiconductor fabs.
There are actual capacity constraints. You're not going to change them very much by printing a ton of money.
If you print money and give it to trainers / mentors so that they can scale themselves to train more people for relevant skills.
Even in US, labor participation is 62%. So we have 38% slack. Now, think about India, Africa were able bodied and smart people don't have opportunities to use their body/mind and a significant portion.
Like I said, your understanding of economics is still basic.
tl;dr -- Unless all 8 Billion people are at peak productive capacity, there is always slack and wherever there is slack printing money (with the right incentives) is an easy solution
Well, I don't think much of your understanding of economics either. 62% labor participation rate is massively different from 38% slack. Not all of those 38% are available to work. Far from it. We might have 5% slack. Pessimistically, 3%.
So back to the original point: No, we can't produce all that hardware, even if your vision of the payback is real.
Now, if it's not real, then you just upended the entire economy, caused inflation, wasted a huge amount of resources and time, all to chase an illusion.
Look, I know you believe the payoff is there. I don't. In reality, the probability has to be something less than 100% (and something more than 0%). And politically, nobody cares what either you nor I think. They only care what the population as a whole thinks, and the population as a whole does not thing that we should harness the entire global economy to chase this. So in practice, you're left with what a company can do. And, to return to my point several comments ago, a company can't do a $100 trillion cluster, and won't be able to.
Are all 8 Billion people at their peak productivity? No.
There is slack in the economy.
If people don't want to work, it's a money printing problem. At constant $$ of say $1 Million annual salary, a lot more than 3% of the 38% slack will work.
The reason we don't pay $1 Million is because we don't think they will produce $1 Million worth of output. But, if we know that we are producing $100 T output, you'll pay them $1 M Dollars
Thought Experiment : Let's say the world unemployment is 25% and we can build a magical nuclear reactor that produces near infinite clean energy, but it costs $50 Trillion to build.
Are you going to wait for the world to save $50 Trillion (which may take 50 years) to build this reactor or are you going to print $50 Trillion give those 25% jobs in creating the nuclear reactor?
The only precious commodity in the universe is time. If you don't print $50 T, you are wasting the time of 25% unemployed people.