WRONG. Voters elect senators to represent their interests.
Something today's congressmen and women seem determined to avoid doing.
You are correct. Of course, originally, senators were selected by the State to represent the interests of the state. That worked pretty well. But then the popular election of senators was ratified, and now senators represent the interests of the people and as long as they have money, they can finagle their way to re-election even if they never do a darn thing.