What good is it to have money, if you can’t buy influence? If I had money I would use it to best suit my family. I blame my parents for being poor.
But, really money does buy influence and it should. Communication skills will always matter and they should. Introverts can communicate just as well as extroverts, they can take on leadership roles, and they can be successful.
Another good read is Emotional Intelligence; I believe that if you place to a high a value on Intelligence and not enough on interpersonal skills you are only looking at a small part of the picture.