> The money and power corrupted them.
Actually accomplishing things in the world that constitute building a sci-fi dream world requires significant amounts of money and power, and any person or institution at all that could in principle have the capacity to do this would also have the capacity to become corrupt, at least by someone's judgement.
Personally, I'm pretty happy with many of the sci-fi things that tech billionaire nerds have made their money by bringing into existence. I rode across town in a self-driving Tesla the other day while giving orders to its AI system about how and where to go. That was a pretty sci-fi dream world experience. That's worth quite a bit of corruption.