I would't even call it fixing. I'd call it influencing. Even if the teams they want to win don't win, people will still tune in to the Superbowl. But it literally only takes a half dozen or less biased calls all season to grealty increase the odds of getting whatever teams you want to the postseason. If the league really wanted it to be a fair game, critical penalties could be reviewed and overturned if need be in real time by the office full of experts they have in NYC that monitor the games. They can review plays several times in slow motion from several angles before the head ref can even jog over to the replay camera.
Did you ever wonder why every scoring play is instantly reviewed for verification yet penalties on game-deciding plays at the end of games aren't? I sure have. I'd much rather have them review a questionable pass interference call in a one-score game with 2 minutes left in the 4th quarter than review whether a guy crossed the pylon before his knee was down. Hell, I'd even be willing to leave it up to the ref's eyesight and the possibility of human error for the latter if it meant game-changing penalties were challengable or at least reviewed from headquarters.
For a corporation that nets revenues in the tens of billions of dollars a year they sure seem to be behind the times in regards to technology. A group of 2nd year engineering college students with a budget of a couple thousand dollars could easily set up a system that would instantly solve the problem of "did he step out of bounds" or "did the ball break the TD chalk line?" with microchips and sensors. Why can't the NFL? One answer could be that it's one of the last remaining ways they can try to control games.
