Its pretty obvious. His mother's name is in the list as well, and her name is actually linked to a crime.....bribing Iraqi officials to get oil contracts.
So even though Benazir is no more, the mere embarrassment and humiliation at having her name mentioned in a foreign report is enough to send the PPP into a tailspin. Previously, PPP followers used to believe that Zardari was the only corrupt person, and that Benazir was clean as a whistle. Now with this revelation, it changes a lot of things.
It is because of this that PMLN, and now PPP too will try to disparage the report altogether.
Then again, who takes Bilawal seriously.