Sarah palin explained it best when she said it is "a lot like being a social organizer, except you have real responsibilities...." .
Mrs. Palin also, by the way has a record of being on of the most effective and most respected governor in the history of Alaska (80% approval rating), and one of the most respected Governors in the US today. Giuliani has never been a governor, ever. So you facts are all wrong. Additionally, Obama and Biden have both spent their political lives in the Legislative branch of government. and neither of them has ever been a mayor, or a governor, and neither has any experience in the Executive branch of government (that's the presidents office, also).
So, then, your facts are wrong and your question is way out of line.