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In 30 years what has Scientology done with billions of dollars, the greatest technology since fire and a free labour force?
Umm .. Metres of marble ... <crickets.mp3>
Unlike NASA, Scientology has already achieved its real goal. Not the 'shore story' stated goal, but the real goal. LRH lived in luxury, surrounded by those who adored or at least sucked up to him, and he managed to stay away from process servers, and out of prison.
Obviously, his dementia wasn't a part of the plan, but that could happen to anybody.
NASA's work is incomplete because it's far more ambitious, and far more moral... but Scientology basically finished with the death of a fat old liar in a trailer, shot full of Vistaril. What remains to Scientology is just the fighting over the leftovers, and is insignificant. It doesn't matter that nobody wants to play the silly role-playing game anymore, because Ron is gone. It doesn't matter that the 'Tech' doesn't work, because you can't call Ron out over his lies: he's gone.
Ron won the Scientology game in a way that nobody else ever will: his con paid off, and he got away with it. For life. Scientology has no purpose, post-1986: just a few people who didn't get the joke, even when it was explained to them, and for some reason still believe the woo-woo.
By contrast, NASA has done a lot, and will do a great deal more - not least because they apply the scientific method.