Getting more information on the corruption of his earlier charity would be helpful. A lot of celebrities lend their names to things like that without knowing or even caring about the day to day accounting activities. It doesn't mean I'm giving him a pass, just saying that he may not have been elbows deep in the corruption on a personal level.
I hear what you are saying, but this wasn't (or isn't) "old news". Much of the problems and surrounding questions about his charity, Yele Haiti Foundation, came to light very recently, in the immediate aftermath of Haiti's latest tragedy. More can be found here....
Wyclef Jean Charity's Funny Money
Unlike some other problems with celebrity charities - like some of the problems we've seen in the Darfur and Katrina charities - there are allegations, some very substantiated allegations, of Wyclef personally enriching himself with the proceeds from his charity.