Correct me if I'm wrong, but the underlying concept of a democracy is to vote for one person to represent you in congress. So why is it that these people only s

Correct me if I'm wrong, but the underlying concept of a democracy is to vote for one person to represent you in congress. So why is it that these people only stand up for the rest of us when they themselves are directly and personally affected? Somewhere along the line the word representative has lost its meaning. They forget that they represent every single person in their state, not just the ones that voted for them. They are a single voice echoing the voices of everyone they represent. They are sadly tied conceptually to their political peers, rather than those they represent. They should be fighting for us, not against us.