How about mandatory 2FA rfid token implants, then we can put this SSN business behind us.

You can't really mandate implants. Well, you could but that's how you get open revolution in the streets.

Luckily we already have 2fa implants. They're called retinas or fingerprints, to be used in conjunction with passwords.

What you have, what you know, what you are. Those are the three factors. Passwords and fingerprints are two of them.

No actually those don't work for the same reason that SSNs don't work.

You need the ability to change out your password or 2fa if it gets compromised. You can't change your fingerprints or retinas.

Then I don't think you understand the various "factors" of security. I'd advise you to re-read the last line of my post that you replied to where I explained them. "What you are" is a completely valid factor for 2fa, when combined with either "what you have" (a token) or "what you know" (a password).

People need to stop complaining about biometric security if they don't understand the basic concepts of security in the first place. Re-read my first post and this one, and if you're still confused, look into factors of security. Hopefully you can stop parroting this nonsense that fingerprints are not a valid factor in 2fa.

I'm not sure I'd generally refer to those as implants, but point taken.