I see elements of Darwin's work as evidence in many things. One of them is translated in the answer of the same 'Ol same question; Why rulers are not behaving they way they 'should'! Mental corruption is a natural state of mind. It is once a person's weak faith(in own self, ideology, promises,,) is put to the test or to the seduction. You will probably never see a ruler ruling in favor of the majority or 'righteousness' (For long). That ruler will either change his/her own views or got rid of by others. Don't expect homosapiens who were not able to speak and 'reason a bit' till a late persiode of their historical existence to act 'righteous' or 'fair'. I guess you only need to show your support to those who are not tempted by money, power, violence or any other matter that can cause society any harm (later). Live a little!

Politics has become a game and it is all about strategy to become a player on the world stage.
Todays Politicians live in a bubble and mingle with the movers and shakers in society to garner support by granting favors. Image and optics are a priority. Politicians are removed from the everyday struggles of ordinary taxpayers.

My grandfather once told me, the biggest mistake taxpayer made was allowing all levels of government to take the taxes directly from our paychecks. We traded convenience for loss of control.

Most politicians are there for their own benefit unfortunately. This is why there has been a steady decline in the respect for them that especially the younger generation accord them.

Research the topic: There is much excellent literature on leaders and leadership

There are no perfect leaders, but a number of truly great ones in government -- Lincoln, Theodore Roosevelt, Franklin Roosevelt, Harry Truman, Winston Churchill, Sadat and many more.