If you're a billionaire, you don't feel the need to win the unaffected public's affections. You just do good because you have the resources to do it and can derive satisfaction from the people who are benefiting. You don't get to being ruthless enough to become a billionaire if you're dependent on what uninvolved strangers think of you. If you were, you'd be giving it all away well before piling up enough to become a billionaire.