Power is addictive. Why do you think people get addicted to cocaine? It's because the cocaine gives them the illusion of believing that they can do what ever they want. In the case of politicians, they have the power to control the lives of people and the path in which society chooses to follow. I don't expect you to understand it, since you haven't been in their position but you should ask your self, who do you feel if you were the only bread winner in the house and you wife/ husband switched positions with you? You would having fun staying home and doing nothing most of the time but you will lose the power of control.