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Humans think they can control everything. We can't. Even if Robots were to automate everything, what happens when a tsunami hits Japan? Destroys sources of power, robots, the power grid. What do they do then?
We talk about all this "AI" as if it's close to fruition. It is not close to fruition. The "robots" Foxconn is getting aren't autonomous. They're just machines that do what they are told to do.
The "rich" people need the poor people. Without other classes, there is no rich. If everyone is in jail, who buys the goods?
What is money worth if there is no one to compare it to? If everyone is poor or in jail...why do you want money? For what? To do what? To drive a nice car that no one cares about because they can't afford food?
People are too quick to overestimate robotics and artificial intelligence. 100 years ago we were supposed to have flying cars, laser guns and teleportation. These were exaggerated views, just as ours are now.