When people are retired, as per your comment to which he replied, they are not going to work much. You can not call it retirement when people work (roughly) as much as they do now.

Here is the full text of the comment you are referring to:

Enough to lower the social security age from 67 years to 6-7 weeks gestational age. Remove the cap, include cap gains, and UBI becomes a thing.

"Retired" was not "per [my] comment" but from the "comment to which he replied". I didn't use the word; the other person did.

I referred to the new, social security system as "UBI". Universal Basic Income. Also known as a "Citizenship Dividend". When we remove the caps, and tax capital gains as well as income, the "social security age" is no longer the age at which someone retires, but the age at which they initially join society.