[godwinson__4-8]

Your first two sentences were correct. The last one is already being proven false.

It's a threat to everyone. UBI is the only way.

[astrange]

Productivity improvements tend to increase employment. AI will not reduce employment.

(Also, the US budget deficit is way too high to afford a UBI.)

[godwinson__4-8]

You may be right. Alternatively, Jevons paradox may hit a limit yet.

It also is not clear workers will be needed. The gain may not be in employment. Perhaps another paradox will arise as the additional gains will be consumed by AI itself. How unique are your prompts? Self prompting is a clear end state.