Albert Einstein said that the true sign of intelligence is not knowledge but imagination.
What if even though 90 % of the population has underdeveloped brain, the other 10 invent advanced AI that builds robots enough to take care of the economy? Possible?
Well, theoretically - yes. Practically, (a) the human-level AI is not coming any soon (decades!); (b) what a society that would be?
About ten years ago I read some piece on China. The author was ensuring people that China would need decades to catch up with the U.S.. I wrote a short comment: there is "no" China, there are two "Chinas" - "Poor China" that is a constant supply of a cheep labor for "Rich China", that already has the size of America. In America there are 300 million people. "Rich China" already has 300 million RICH people, rich by American standards. This is how economists and politicians have to analyse China.
In ten years this comment has become only stronger.
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