Do we know for sure how honest NFL officials really are?

I tell you, I have really come to wonder after watching NFL games that the officials, for whatever reason, are attempting to influence the outcome of these games. Are we really sure that these guys are above board and truly impartial. I say this because, is it the Commissioner trying to get the Super Bowl match up he wants or are these officials taking bribes/betting on games. We will never know but what we do know is this is a flawed product and something has to change.