The letter U in UBI means something. Social security is not universal. It's not even universal for retired people -- you have to pay into the system while you work to get the benefits when you retire.

It is becoming increasingly tiresome to see any benefit touted as UBI. UBI mean universal benefits. If there are any criteria that prevent a person from receiving a benefit, it's not UBI -- it's just another benefit of the sort we've had for decades.

Again, benefits for that (including whether you get any at all) are based on quantity of qualifying income, adjusted by wage index from the year earned. Its not remotely a UBI. A UBI is given at a fixed amount to all members of the eligible class, which is not determined by income past or present.