The revelation that Bernard Madoff  brilliant investor (or so almost everyone thought), philanthropist, pillar of the community  was a phony has shocked the world, and understandably so. The scale of his alleged $50 billion Ponzi scheme is hard to comprehend.

Yet surely I’m not the only person to ask the obvious question: How different, really, is Mr. Madoff’s tale from the story of the investment industry as a whole?

The financial services industry has claimed an ever-growing share of the nation’s income over the past generation, making the people who run the industry incredibly rich. Yet, at this point, it looks as if much of the industry has been destroying value, not creating it. And it’s not just a matter of money: the vast riches achieved by those who managed other people’s money have had a corrupting effect on our society as a whole.

Let’s start with those paychecks. Last year, the average salary of employees in “securities, commodity contracts, and investments” was more than four times the average salary in the rest of the economy. Earning a million dollars was nothing special, and even incomes of $20 million or more were fairly common. The incomes of the richest Americans have exploded over the past generation, even as wages of ordinary workers have stagnated; high pay on Wall Street was a major cause of that divergence.