politicians must somehow know better.

No, no, the accusation is that politicians are lying.

Let's phrase this another way. Asking every single website in existence to implement and maintain an ID database and monitoring system is expensive, yes? So, why wouldn't private companies shift some of this responsibility off to a 3rd party who specializes specifically in this service?

If I were google, I would:

• One, be very excited about tying a user's account analytics to their government personhood; can't multiple-credit-cards your way out of that one.
• And two, already be looking at my own 3rd-party user login service as a means of beating out all competition in this space.

The only thing left to do is lobby. Politicians might not have this vision, but they do understand really expensive dinners.