Buffett wants to pay more tax

The United States' second-richest man has delivered a blunt message to the Bush administration: he wants to pay more tax.

Warren Buffett has complained that he pays a lower rate of tax than any of his staff - including his receptionist.

Buffett, who is worth an estimated $52 billon, said: "The taxation system has tilted toward the rich and away from the middle class in the last 10 years. It's dramatic; I don't think it's appreciated and I think it should be addressed."