What is or is not fair is irrelevant. It isn't fair that famous people have more "voice" than non, by virtue of their fame alone. It isn't fair that some people will never have to do an honest days labour in their entire lives, by luck of birth. It isn't fair that some are born with better mental or physical facilities than others. Hell, for you Christians, it isn't fair that Jesus had to be tortured then died just so the rest of you can achieve salvation.
But what can we do? Famous people have more voice because everyone is more interested in what they have to say than most of the rest of us. Can't bar famous people from politics any more than you can bar idiots from voting. You can't kill wealthy people, or prevent them the right of inheritance...and you certainly can't force all children to develop the same way.
Rich people pay more because non rich people can't afford to. That's the bottom line.