[throwaway29303]

  Too much gameable measurement on the tax end, and too much unnecessary bureaucracy both to support that on the tax end and the retraining end;

I'm not sure if I agree with this because, after all, AI systems are going to be taking care of this so... What's bureaucracy for us is a couple trillion cycles on a CPU/GPU on a machine somewhere in a data center.

An agent to take care of the bureaucracy, another to retrain someone for a new job, etc.

And, yes, the long-term plan would be to fund UBI at some point; because if these systems become so capable and so efficient might as well let them do everything for us while we humans enjoy leisure time.