The issue is that, for me and anyone else who reaches retirement age after 2034, only about 80% of that basic income will be available. For reasons I'm not super clear on, this idea tends to get coded as a conspiracy theory in many circles, despite being uncontroversially true and widely reported on.
That's a perennial Boogeyman. Policymakers have a wide array of tweaks they could make (from adjusting the cap to adjusting retirement age) at any time that could push that out by another century. https://www.epi.org/blog/a-record-share-of-earnings-was-not-...