Anybody else see Gary Locke on the Daily Show last night?

The mailings are actually a huge money saver. I don't remember specifics,
but the mailings have been shown to reduce non-reporting by 15%ish. And for
every % the Government saves something like 85 million dollars.

Since it is mandated by the Constitution, every non-reporting household
requires census takers to visit the home, often more than once since people
may not be home.

Mystery solved.