Megan McArdle, Columnist

Debt Alone Won't Crush Puerto Rico. Depopulation Is the Curse.

Erasing the island's bond obligations would not be sufficient, if migration continues.

The trend lines in Puerto Rico are going only one way.

Photographer: Xavier Garcia/Bloomberg
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“They owe a lot of money to your friends on Wall Street,” Donald Trump told Geraldo Rivera. “We're going to have to wipe that out. That's going to have to be -- you know, you can say goodbye to that. I don't know if it's Goldman Sachs but whoever it is, you can wave goodbye to that.”

Bond markets didn’t appreciate the verbal wave. The territory’s bonds, already weak from the pounding of Hurricane Maria, fell another 31 percent. White House budget director Mick Mulvaney hastened to say the president didn't mean what he said. “I wouldn't take it word for word with that,” he said demurely. Nor should you; as debt expert Cate Long told CNN Money, “Trump does not have the ability to wave a magic wand and wipe out the debt.”