The system is in place and apart from tweaking it, there is no changing it. That's why a rule made at the top so affectivly gets implemented and enforced down the line. The only way to keep the system and change it would in theory be to do it from the top, but I'm not sure how doable that is. Any presidents who've tried to usually end up assassinated or at least attempts of assassination.

The other alternative is to completely topple the system and many fear things would fall into chaos that way.