Warren Buffett on financiers and derivatives traders

"If 50 of us were on a ship and there was a shipwreck, we all swam to an island, we knew we'd never be rescued - and fortunately it was a fertile island so we could all plant rice and grow enough to take care of ourselves. We would not take the five smartest people out of the 50 and tell them "why don't you start trading rice futures and speculate among yourselves", and by the way we think that's so valuable we're going to give you the most money and probably a favourable tax rate on top of it. Hell no, we'd get everybody producing rice."

More excerpts from his BBC interview at The Guardian.