Why Are Officials "Bullet Proof"?

Now that the Great American pastime called football is finished for another year, and it is just a few weeks until March "madness" begins for College Basketball. It is time to ask why officials cannot be criticised?
Although it is next to impossible for a lay person to find out how much money is bet each week on college and professional sports. I would guess that it is in the hundreds of thousands of dollars, pounds, rubles and euros.
If for no reason other than this is a lot of money riding on from three to seven human beings getting their "calls" correct during the games. It is worth asking why the respective league offices have been declared officials off limits for criticism?
The list of fines levied by league officials on coaches and players is long and questionable. Are they protecting the image of their sport so it will be an appealing thing to watch on the lucrative television "cow" that feeds the sports owners and players?
Owners are not immune to fines for their statements either. Mark Cuban, owner of the Dallas Mavericks has been fined at least 1.5 million dollars for his criticism since purchasing the team in November of 2000.
Owner Dan Rooney, owner of the Pittsburgh Steelers, was fined 25 thousand dollars after the Steelers loss to Atlanta 41-38 10/22/06. He said: "the referees should be ashamed of themselves". Anyone who watched the games this past year has to agree there were too many bad calls to go un-noted. Was it tired, sloppy officiating by some men who are too old to do the job correctly, or was it bias or even worse, financial inducement?
Instead of allowing after game criticism during the press conferences, as would be a normal and appropriate opportunity to blow off some steam. The NFL has placed a gage order on all coaches and players. This doesn't show the league is serious about having the best officiating for their games.
The same criticism goes for the NHL, NBA and extends into the College game.
Recent examples are Jason Kidds' 20 thousand dollar fine for his comments about NBA official Tom Washington after his Nets lost 92-91 to the Detroit Pistons.
Maybe it is time for a Congressional Committee to look into this issue. It would fit into their schedule nicely along side the rest of the "attack" hearings to make President Bush look bad!