On top of everything Lehman Brothers did before it collapsed in 2008, nearly toppling the financial system, it now seems that it was aggressively massaging its books. A new report on the Lehman collapse, released last week ... would leave anyone dumbstruck by the firm's audacity - and reminded of the crying need for adult supervision of Wall Street. The 2,200-page report [finds that] Lehman engaged in transactions that let it temporarily shift troubled assets off its books and in so doing, hide its reliance on borrowed money. The maneuvers ... made the firm appear healthier than it was. [The author, Anton R. Valukas, a former federal prosecutor,] wrote that Richard S. Fuld Jr., Lehman's former chief executive, was at least grossly negligent," and that Lehman executives engaged in "actionable balance sheet manipulation." According to the report, rating agencies, government regulators and Lehman's board of directors had no clue about the gimmicks. The result is that we were all blindsided. And we could be blindsided again. Congress is not even close to passing meaningful regulatory reform. The surviving banks have only gotten bigger and more politically powerful. If the Valukas report is not a wake-up call, what would be?