Ask HN: Do you believe in the Permanent Underclass theory?

Recently I've been hearing about the Permanent Underclass,

In my words it is the idea that those who don't build wealth before AI is capable enough to replace them, will be put in a position to be forever poor unable to find work.

Heres how Guillermo Flor put it 'Today, it has become repopularized as a viral term for a theory that posits that people have a limited window of time to build wealth before A.I. and robotics are advanced enough to fully replace human labor.'

What are you all thinking,

Disclaimer, I remain neutral, I do not believe or disbelieve in this theory.