"Letting this go unchecked is a threat to our democracy. Campaigns should be about the best ideas, not the biggest checkbooks," said Udall at a press conference.

Only a constitutonal amendment can reverse the ruling. The amendment adds language to the Constitution that says Congress and the states can regulate campaign contributions and expenditures. It doesn't address the Supreme Court's  legal finding that corporations have a right to free speech that was curtailed by election law.

Udall's amendment authorizes Congress to regulate raising and spending money for federal campaigns, and allows states to do the same. It also allows Congress to pass campaign finance reform legislation that could withstand constitutional challenges."  from : sustainablebusiness.com
I found that writing to our congressmen about having them get rid of their benefits was not effective.  This is their solution but it is one of many bills of this nature that have failed. 
National and local elections have been infiltrated by contributions to secretaries of state and election officials and most elections whether state local or federal have been "fixed" since the economy is so bad everyone has lost their moral conviction so the low paid govt. workers can keep their jobs or get a little under the table.  Corporations and rich voters can keep it all quiet for them to do this.
Money is not free speech it is paid speech.  The city of Boulder is starting a Constitutional Amendment proposition as well concerning Citizens United and the unlimited use of money in our elections.