Garbage In, Garbage Out?

Almost everyone I know is a good, moral human being. We mind our manners and do the right thing. We never intentionally harm others. We are the good citizens who keep the ball rolling. So how is it that we've allowed our county to be ruled by such stupid, feckless scoundrels? We've let the USA become USA Inc., a paradise for sleazy grifters like Lloyd Blankfein and Jamie Dimon, the Romneys, the Bushes. I just can't get over it. I'm a good person. You're a good person. Why are our leaders such inept cads? Where do they come from?