This is because the highest levels of the most powerful governments in the world are dominated by highly manipulative people. If you serve truth, humanity and the world, you are almost certainly delightful to be around and you will almost certainly never have a career in federal politics. The system is set up to serve a ruling class of plutocrats and their lackeys, so the way to get to the top of the political ladder is in the exact opposite direction of serving the weak and defenseless and being truthful and compassionate. To win elections you first need to win the blessing of the ruling class, and the way to do that is by kissing the right asses while regurgitating the right sound bytes whenever the cameras are rolling.