Why do lobbyists for (fill in the blank) have the ears of politicians?  Because they know, with certainty, that very few citizens actually take the time, or take the interest, to write their elected officials to express their feelings on anything.  So who do politicians listen to?  Exactly.
Do you think for on nanosecond that the Koch brothers and their ilk have YOUR best interest at heart?  
Vote.  Write your elected officials.  Become an engaged, responsible citizen.  Writing an e-mail takes no time at all.  Republicans, Democrats, take back your system.