In government, there are constituent management systems that allow staffers to manage correspondence, calendars, etc. Letters get triaged and things of interest either due to subject matter, the person writing it, etc move up the food chain. Depending on the principal, they see a few dozen per week.

These systems also allow for tagging of people too. Crazy people, various group affiliation (union, conservative, pro-x, anti-y), VIP status, etc. They also queue up personalized responses to specific issues to be timed with events, press hits, etc.

Many high level people really enjoy hearing from real people.