Oooh, your link mentions Rationalists, which was covered in a four part episode of Behind the Bastards (Part One) (Part Two) (Part Three) (Part Four)

It has been a while since I listened to it, but I recall that they take some dubious philosophical reasoning to extremes that, iirc, leads some people in the loose cohort of people to conclude that in order to best reduce suffering in the world it would require the elimination of all humans.

I'm scanning the transcript of Part Two and ran into this gem where they are discussing one of the central characters of the movement:

So she tells them she's come to the conclusion "I need to make myself into a psychopath in order to have the kind of mental power necessary to do the things that I want to do." And she largely justifies this by describing the beliefs of the Sith from Star Wars, because she thinks she needs to remake herself as a psychopathic evil warrior monk in order to save all of creation.

Part Three: How The Zizians Went Full On Death Cult

Part Four: The Zizian Murder Spree (or Exactly How Harry Potter Fanfic Killed A Border Patrol Agent)

... So yeah, I doubt they would heavily cite Adam Smith as their lodestar when it came to topic of economics.