What is the definition of a "rich person"? Is it annual earnings of $100K?...$200K...$500K? I think everyone's answer to that would differ and be dependent on what our particular economic situation is. I would guess to a person making $40K per year, even $100K would constitute being "rich". If you asked most people earning $200K, they would tell you that they are not "rich", and have similar challenges living within their means. This is the primary challenge I see with a "Robin Hood" approach to taxation.
We have touched on it several times before, but a flat tax is the fairest way to raise revenues and do away with loopholes. This way, there is not tax shelters for the rich or ways for corporations to defer taxes. Unfortunately, this is unlikey to happen in the U.S. as long as lawyers and accountants run Congress and other branches of the government...think about it...all three branches of the U.S. are dominated by lawyers, who have an inherent interest in keeping things complicated through legal complexity, requiring their profession's services to interpret and lead the "uneducated" public through the various legal mazes.