http://www.nytimes.com/2010/04/28/business/economy/28leonhardt.html~~
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The beauty of a bank tax is that it acknowledges as much. Financial firms play a vital role in a market economy. But they also have a long record of causing crises, be it the South Sea bubble of 1720, the Panic of 1873, the Great Depression or our own Great Recession. A bank tax is akin to an insurance policy that taxpayers would require Wall Street to hold. The premiums on that policy would keep Wall Street from making big profits in good times while foisting its losses on society in bad.
The current Senate bill includes a kind of bank tax, but it has all kinds of problems. It would initially collect only $50 billion from firms and then set the money aside to pay the costs of future bailouts. Other crises have cost far more than $50 billion.
For this reason, the Obama administration prefers a postcrisis tax. The White House has proposed a so-called TARP tax, to raise at least $90 billion over the next decade and cover the costs of the 2008 bailout fund (the Troubled Asset Relief Program). But this idea has its own flaws. It does not leave any money for future busts. It assumes Washington will always be able to recoup those costs later, which doesn’t sound like a great bet.
The I.M.F. prefers a permanent tax, for the good reason that the risk of crises is permanent. “The challenge is to ensure that financial institutions bear the direct financial costs that any future failures or crises will impose — and maybe somewhat more, given all the other costs that bank failure can impose on the economy,” Carlo Cottarelli, the head of the I.M.F.’s fiscal affairs unit, wrote last weekend. The tax wouldn’t go into a dedicated bailout fund. Its purpose instead would be to discourage too much risk-taking and, over the long term, help offset any bailout costs.
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