I don't think more data is better at all.
The example you give is a very worthwhile one. You want to reach out to people, but there are so many risks in using data for purposes never intended. Theoretically, we give data to the government for a particular purpose. We pay our taxes or we do whatever. That's the intent. It's the primary purpose of the data collection. The intention is that you're supposed to use that data for that purpose and limit your use of data to that unless you have the additional consent of the data subject, the citizen.
The minute you start deviating for what you might think is the greater good, and that it's better for them if you have access to all their data and can send them additional services or information.... They may not want you to do that. They may not want.... Privacy is all about control: personal control relating to the uses of your information. The minute you start stretching that out because you think—I don't mean you personally—the government knows better, that's going to take you down the path of surveillance and tracking, which is the completely wrong way to go. I say that with great respect, because I know you mean well here, but I would not go.... Plus, when you have data at rest, massive amounts of data at rest, it's a treasure trove.