Honestly I agree with this. They all put on a show and dance that they're trying to investigate one another -- saying that they rooting out the corruption and so on and so forth. But BAM -- there's some sort of roadblock, maybe an attorney drops the case (like your AG), or a judge dismisses the case, and so on and so forth.

Both parties have a vested interest in keeping eachother around, because both sides know that all they have to do to keep power is just to win some years and lose in the other years. Why would they arrest one another and ruin all the money and power that they've accumulated and will accumulate over the years? The only thing that the parties will agree with is that they're going to try to give more money to the rich, and that they're not going to let a third party grow in ANY way. Makes sense, eh?