The United States is commonly referred to as a representative democracy. Do Congressmen and women genuinely represent the masses or has the government become a forum for the powerful elites?

I think that the government become a forum for the powerful elites and not genuinely represent the masses by the Congressmen and women because groups and companies are trying and getting their project done by the Congressmen and women because the groups and companies fund the Congressmen and women and they will do anything that the groups and companies ask them to do.