Yes, they are all corrupt:
The culture of self-interested denial is rooted in Labour\’s success in characterising John Major\’s government as being sleazy. New Labour\’s victory, leading ultimately to a third term, was not just associating all Conservatives with the dishonesty of Neil Hamilton (linked to the "cash for questions" affair in 1994) and Jonathan Aitken (imprisoned for perjury in 1999), but also in exploiting Lord Scott\’s critical inquiry into the government\’s approval of sales of weapons to Iraq as a manifestation of Tory deceit.
Drawing lessons from that success, Tony Blair and Gordon Brown decided that they would never repeat John Major\’s mistake of appointing an intelligent, independent-minded lawyer like Scott to investigate their own conduct. Since 1997 every official inquiry into alleged government misconduct has been entrusted to loyalists, patsies and payroll wallahs. The parallel success has been to silence Tory criticism about Labour sleaze.
As the Devil says, Hang Them All.