The NFL has embarked on a little light reading in an effort to discredit the idea that Williams was acting without Payton's knowledge. Sam Farmer of the Los Angeles Times reports the NFL went through Payton's book "Home Team" to find where he references his control and deep attention to detail.
I buy way too many old football books, but "Home Team" is not part of my football library. I suspect it won't be hard for the league to find evidence of Payton's total control over his organization. In a league full of obsessed coaches, Payton's reputation for having a hand in every minor aspect of his team is well known.
That's why it's so hard to believe Payton didn't have deep knowledge of the Saints' "bounty" system, essentially approving its use even after the NFL's initial investigation into the matter. Blaming everything on Williams is missing the point.