Please refer to the linked article.

Also, do you really think Warren Buffet would be hurt by paying the same percentage as his secretary? He's the third richest man in the world, I think he can afford to pay.

The worst offenders are the corporations however....

PS Buffet mentions in the article that he DID NOT TRY FOR TAX BREAK INCENTIVES when he was taxed at 17.7% - he could have paid an even lower percentage.