Why should American taxpayers have to bail out foreign banks?

Now we aren't just going to pay for mismanagement of American banks, we're going to pay for mismanagement of overseas banks as well:

The financial crisis that began in the United States spread to many corners of the globe. Now, the American bailout looks as if it is going global, too, a move that could raise its cost and intensify scrutiny by Congress and critics.

Foreign banks, which were initially excluded from the plan, lobbied successfully over the weekend to be able to sell the toxic American mortgage debt owned by their American units to the Treasury, getting the same treatment as United States banks.

On Sunday, the Treasury secretary, Henry M. Paulson Jr., indicated in a series of appearances on morning talk shows that an original proposal introduced on Saturday had been widened. “It’s a distinction without a difference whether it’s a foreign or a U.S. one,” he said in an interview with Fox News.

I wonder who the representatives of the foreign banks were who successfully lobbied to have their bad debts offloaded to the American taxpayers. Josh Marshall does the math and comes up with the obvious answer.