UBI is cool but it'd mean there will be no upward mobility.
Once you become the recipient class, that's it.
No amount of hard work or above avg level intelligence will be enough to compete with the resources (AI, automation) of big conglomerates so you're forever stuck there once the power of AI goes over the inflection point.
It's basically the blue pill in Matrix situation where they feed you enough to get the consumption going to sustain the economy and prevent social upheaval.
Sad thing is I don't see any other scenario unfolding either.
No Neo and red pill in reality.