LONDON – "What a commentary on the state of twentieth-century capitalism,” mused "motivational speaker” Jordan Belfort as he looked back on his life of fraud, sex, and drugs. 

As head of the brokerage firm Stratton Oakmont, he fleeced investors of hundreds of millions of dollars in the early 1990’s. I saw Martin Scorsese’s film The Wolf of Wall Street and was sufficiently intrigued to read Belfort’s memoir, on which the screenplay is based. I learned quite a lot.

For example, the scam known as "pump and dump,” which netted Belfort and his fellow Strattonites their ill-gotten gains, comes into much clearer view in the memoir than it does in the film. The technique works by buying up the stock of worthless companies through nominees, selling it on a rising market to genuine investors, and then unloading all of it.

It was not just small investors who were ruined; what stands out is the greed and gullibility of the rich who were sold the same rubbish by the "young and stupid” salesmen Belfort preferred to hire. Belfort was (is) obviously a super-slick snake-oil merchant, brilliant in his trade until drugs ruined his judgment.

Belfort, once again selling the elixir of success after a brief stint in prison, professes to feel shame for his behavior; but I suspect that deep down his contempt for those he swindled outweighs any sense of remorse. In a recent book, Capitalism in the Twenty-First Century, the economist Thomas Piketty describes Stratton Oakmont as an example of "meritocratic extremism” – the culmination of a century-long passage from the old inequality, characterized by inherited wealth and discreet lifestyles, to the new inequality, with its outsize bonuses and conspicuous consumption.

Belfort has been described as a perverse Robin Hood, robbing the rich to give to himself and his pals. The rich were the old-money Protestant establishment whose members had lost their skills for protecting their wealth, which was therefore rightfully forfeited to street-savvy up-and-comers – mainly Jewish – amoral enough to help themselves to it. But Stratton Oakmont’s peculations were hardly an exception on Wall Street. As a good friend, who was an SEC regulator for 20 years, told me when I asked about the extent of fraud, "I found it to be pervasive. The system simply makes it too easy, and human nature colludes on both sides. Greed is the source of all cons.”

The Wolf of Wall Street was a predator, but so were all those reputable investment banks that shorted the products they were selling, and the retail banks that offered mortgages to unviable borrowers, which they could then repackage and sell as investment-grade securities. They were all wolves in sheep’s clothing.

It is not the extent of the financial system that should alarm us, but its concentration and connectivity. In the United Kingdom, an ever-increasing share of bank assets has been concentrated in the five largest banks. Standard economic theory tells us that excessive profits are the direct result of concentrated ownership.

Connectivity is the link between banks. These links can be locational, as in Wall Street or the City of London. But they became global through the development of derivatives, which were supposed to increase the stability of the banking system as a whole by spreading risk. Instead, they increase the system’s fragility by correlating risk over a much larger space.

As a paper by Andrew Haldane of the Bank of England and the zoologist Robert May points out, derivatives were like viruses. Financial engineers and traders shared the same assumptions about the risks they were taking. When these assumptions turned out to be false, the entire financial system was exposed to infection.

Concentration and connectivity reinforce each other. Two-thirds of the recent growth of banks’ balance sheets in the UK represents internal claims among banks rather than claims between banks and non-financial firms – a clear case of money breeding money.

Reformers want to cap bankers’ bonuses, create firewalls between banking departments, or (more radically) limit a single bank’s share of total banking assets. But the only durable solution is to simplify the financial system. 

As Haldane and May put it: "Excessive homogeneity within a financial system – all the banks doing the same thing – can minimize the risk for each individual bank, but maximize the possibility of the entire system collapsing.” 

As long as banks can make a profit from trading, they will continue to expand derivatives in excess of any legitimate hedging demands from non-banks, creating redundant products whose only function is to make profits for their inventors and sellers.

How to curtail derivatives is now by far the most important topic in banking reform, and the search for solutions should be guided by the recognition that economics is not a natural science. As May recounts: "The odds on a 100 year storm do not change because people think that such a storm has become more likely.”

In financial markets, the odds do depend on what people think. The less thinking they have to do, the better. Jordan Belfort was partly right: people who go into finance should not be too clever.

Robert Skidelsky, Professor Emeritus of Political Economy at Warwick University.

Copyright: Project Syndicate.