There are groups which actively campaign to get money out of politics.

Many groups focus on different tactics to get it done, however most (all?) of them agree the citizens united decision has had a horrible effect on politics in the U.S. essentially legalizing corruption:

https://en.wikipedia.org/wiki/Citizens_United_v._FEC

Some people believe overturning citizens united is crucial to this and campaign for that exact thing. Bernie Sanders advocates for that: https://berniesanders.com/issues/money-in-politics/

While others believe that congress cannot / will not pass such legislation because of the very influence that money pays for. Wolfpac and [some other group I cannot remember]* are seeking to bypass congress by going directly to the states and working to get an Article V convention to add an amendment to the constitution:

https://en.wikipedia.org/wiki/Wolf_PAC

Perhaps most shocking is that this is an issue which nearly all sides can agree on. So it's not like nothing can be done. Ask a Republican if they want Democratic nominees getting huge donations from George Soros or Thomas Steyer and they'll tell you it's corruption. Ask Democrats if they want Republican nominees getting huge donations from Robert Mercer or David Koch and they'll tell you the exact same thing. This is an issue that impacts everyone poorly but a select few multi-millionaires and billionaires.

So not all hope is lost.