No 80 year olds "serving" in DC, unless: (1) they just ran for election; (2) have served less than 12 years.
If those 80 yr olds have been in place since before Ronald Reagan, they need to find a new day "job."
Besides the great age gap, they have lived waaaay too long in DC to have a clue how life is at home for their constituencies.
P.S. If those 80 yr olds live in areas with a preponderance of 75+ voters, they probably DO represent their constituency but again, if they've been in DC longer than 20 years, they still do NOT have a clue what life is at home and need to live comfortably on what we will "give" them to retire on.
The single reason for anyone to stay is POWER!