I like Mr. Innuendo’s entire post, but have highlighted an important key. Congress is dominated by campaign finance. It is said that even the honest Congresscritters need to spend way too much of their time soliciting donations throughout their term, not just in election season.
It may not be clear how best to reduce the influence of money, but many thought that the 2002 Bipartisan Campaign Reform Act (“McCain–Feingold Act”) was an intelligent approach that had some merit. Unfortunately this was struck down in Citizens United v. Federal Election Commission, 558 U.S. 310 (2010) by a 5-4 vote.