About the written or unwritten constitution of the republic, if the Jedi are the Force brotherhood attatched to the judicial branch, and the "Femeret" is the Force sisterhood attached to the legislative branch, then the Sith could be the Force order attached to the executive branch. It seeks to maximize individual power within itself to "do good" as the sole executive or sole secretary down the line. There could be dangers for each Force order. The judicial Jedi might become too concerned with order and calm over justice and the interests for individuals. The Femeret might be in danger of becoming too interested in the corrupt deals and interests is balancing groups and deals. The executive isn't evil in itself but the most in danger of falling to evil. The Femeret and Jedi establish control over their respective branches in part to bloc the Sith from their natural place.