Why everyone wants to vote for a new and inexperienced politician?

[Entropy]

100% disagree. What you don't see is that the process corrupts. When people first go to Washington they are interested in politics for the purpose of making the country better. They get there excited and ready to work and propose legislation to make the world better. They think creatively and often consider finding common ground with the other side.

The longer they are there however, the more the process beats them down. The money is a constant lure, but the constant in-fighting, the way they have to earn their way up the seniority ranks, the way good legislation is casually killed because some more senior senator puts an anonymous hold on it, and on and on and on. The longer they are there the less and less likely they are to give a damn, and the more likely they are to use the process to enrich and empower themselves.

That's why new blood is valuable. New blood is more likely to break ranks with their party when their party is wrong. New blood is idealist and says no to new pork projects. New blood cares about things like the democratic process and will be reluctant to use procedural tricks to kill good legislation.

Yes, experience has some value, but realize that NONE of these politicians write their own bills. They have technical writers and staff who do that for them. They are there to kiss babies and lie to you. Throw them out. We don't even have to throw them ALL out, just enough to scare the rest of them straight.