If its not corrupt, its all very strange. You couldn't afford to bribe Bernie, because he's made so much money out of F1. I can't understand why Ferrari were quick up to 2004, slowed for no apparent reason in 2005, but are quick this year.
Perhaps the deal was "its getting boring - you'll have to let someone else win in 2005 and you can win again in 2006, but you'll have to retire after that." And 2006 went a bit wrong, so the Renaults had to be slowed down, and once Shuey knew he could win he retired.
It seems to fit