We all use cash in our everyday life, but we don't use hundred-dollar bills. We're not using 500-euro notes. And yet these account for mountains of cash out there. I think they're being used in tax evasion and by criminals of all types.

It is vital for Russia to normalize relations with the rest of the world. You shouldn't isolate your economy

If you didn't have employers able to pay off the books and off the record safely in cash, you wouldn't have illegal immigration on nearly the scale that we do.

Marx's theory that only capitalists benefit from capitalism and workers are exploited was completely wrong. Nothing could have been further from the truth. Workers earned more as economies grew.

The Indians and Chinese have become brilliant chess professionals. They get on a plane and play all over the world. This has led to dramatic pressure on incomes. Nowadays, the best chess player in Argentina can no longer make a living playing chess.

Workers are not being exploited. But if their share of growth doesn't increase, this could be a potential cause of social tension worldwide.

People aren't looking at how they're doing, but rather at how their neighbors are doing and at their own place in society.