His alleged Ponzi scheme could inflict $50 billion in losses on society types, retirees and nonprofits. The bigger cost for America comes from the notion that Madoff pulled off the biggest financial fraud in history right under the noses of regulators. Assuming it's all true, the banks and hedge funds that neglected due diligence were stupid and paid for it, while the managers who fed him clients' money the so-called feeders were reprehensibly greedy. But to reveal government and industry regulators as grossly incompetent casts a shadow of doubt far and wide, which crimps the free flow of investment capital. That will make this downturn harder on us all.