The first principle is that you must not fool yourself and you are the easiest person to fool.
Politics is a contest among people of diverse backgrounds and philosophies, advocating different solutions to common problems. The system only works when principled, energetic people participate.
I didn't do it because of the underlying greed that's prevailing, but it is about greed, doing the right thing at the right time using your clout when you have it and what for and what reason.