In the lead-up to November's Presidential election in the United States, groups on the right and left are sounding the alarm at the influence of money on US politics.
Katya Adler speaks to one guest who knows a lot about that.
At the height of his career he made millions as a career lobbyist in Washington, wining, dining and influencing lawmakers.
His fall from grace was dramatic and saw him publicly disgraced and imprisoned for fraud and bribery.
A free man once again, Jack Abramoff says he is a reformed man, lobbying to correct what he describes as a corrupt system where he says his behaviour was and continues to be commonplace.
Is he trying to make amends for his past or put the blame on others?