[thwarted]

IIUC you are arguing that people that grew up with UBI would behave differently compared to people that just switched to UBI? To be honest I don't feel this particular convincing, why should this be the case? There probably isn't any data on it either.

No, I'm saying that this is worth studying, exactly because (I agree) there isn't any data on it.

One problem, as you point out, is the ongoing cost. Socialism works better when there is a capitalist system, externally, to set the prices and help determine demand. The Eloi need the Morlocks to provide for them. The monetary cost for any UBI experiment on individuals' actions is, by definition, being paid for by something outside that experiment. But that's fine, this experiment is meant to answer the question of how the recipients respond to it, not how/if it is or is not long term viable (however the results of this experiment would eventually need to feed into that). And my point is we can start to answer this experiment by examining what people who are born into money do. What kind of jobs do they take? How do they act when they have a guaranteed complete safety net? There is a lot of data available on this, and it is not time limited like a two year study would be.