what causes this phenomenon of senators and congressmen keeping their seats 90+% of the time for decades? why even have elections if so few people change out?

>>510536150 (OP)
The Timeless Truth About Tyranny According To Aristotle. He predicted that governments would prefer foreigners and hate its people.

https://youtu.be/2gkYbrzMAE4?si=eFxyzmjeydjFf5hr