Michael Lewis, formerly a Wall Street trader, is a good writer and has some pretty good insider looks at Wall Street. For a left winger he does try to keep his lefty editorialization out of his books. But that does not mean he will not slip and revert to left wing loon when he is asked his opinion. Looks like someone made the mistake of asking his opinion.
Lewis describes this very conundrum in the later chapters of Liar's Poker, when he found himself facing a personal moral/ethical dilemma between looking out for the company's bottom line (by selling risky bonds they held on their own books) and looking out for his customers' best interest (by steering them clear of the risky bonds the company was asking him to dump on them).