And as with most big structural issues in the US, the answer is right there and obvious for everyone wanting to look for it: severely restrict campaign spending

And as with most big structural issues in the US, the answer is right there and obvious for everyone wanting to look for it: severely restrict campaign spending, ban PACs and the like, and boom, the election process and government in general will become much less beholden to money interests. (Yes, I know about Citizens United - it has to be repealed, which is of course possible).