Political corruption a major problem

Political corruption why is it such a major problem in the world today? There reason i got into this topic would be because you hear about it all the time in the media, I also wanted to become a politician and hearing about all the scandals makes me think i can do a much better job than many of todays politicians. Recently there has ben many scandals whic to my belief were not in portant to the public and should not of been on the news such as the Elliot Sptitzer issue with his prostitutes that is more of a personal problem between him and his family not him and the world. Many people cheat on there wifes and do not make the news about it, it upsets me to hear about all of the people we trust with law making and our funds are with non trustable people.