What I'm surprised Google didn't do about their privacy policy

Okay, I've always noticed that sometimes Google comes up with their own unique ways of getting around certain issues/problems/UI elements/etc.

What I'm surprised they didn't do, is use the same concept of Circles that are used by Google+ in order to personally manage the sharing of data between services. Like, you'd list out what advantages you'd get if you were to put certain services together, etc.

It'd make sense, since a lot of people flocked to G+ simply because they implemented such a privacy system first in such an elegant fashion.