Wall Street is its own worst enemy. It should have welcomed new financial regulation as a means of restoring public trust. Instead, it's busily shredding new regulations and making the public more distrustful than ever.

The Street's biggest lobbying groups have just filed a lawsuit against the Commodities Futures Trading Commission, seeking to overturn its new rule limiting speculative trading.

For years Wall Street has speculated like mad in futures markets – food, oil, other commodities – causing prices to fluctuate wildly. The Street makes bundles from these gyrations, but they have raised costs for consumers.

In other words, a small portion of what you and I pay for food and energy has been going into the pockets of Wall Street. It's just another hidden redistribution from the middle class to the rich.

The new Dodd-Frank law authorizes the Commodity Futures Trading Commission to limit such speculative trading. The commission considered 15,000 comments, largely from the Street. It compromised on key provisions. It weighed the benefits to the public of the new regulation against its costs to the Street. It did numerous economic and policy analyses. It even agreed to delay enforcement of the new rule for at least a year.