You found a heart!
The tapes weren't shown because the Judge that is investigating the corruption case involving the owner is keeping them secret until the investigation is finished. But the Judge admitted the existence of said tapes, but refused to use them to start another investigation since that would break the constitutional right to keep private conversations: the judge authorized recording said conversations just for the corruption case, so they couldn't use it for something else. So... yeah, the League opened an investigation and punished the bribed ones... but that's all.
The "it's a political matter!" part is just a stupid scapegoat claim, since said corruption case involves the regional governor as well. But I can't see how a building contractor bribing a team to get his own one promoted can be considered "a political issue" oo