I admire the design. It's like carbon credits: you can buy pollution credits and simply not use them, if you want to do good by the environment. Buying debt is

I admire the design. It's like carbon credits: you can buy pollution credits and simply not use them, if you want to do good by the environment. Buying debt is much more efficient than lobbying, going through lawsuits, etc. It shouldn't be sustainable, presumably, since all these people buying up debt should raise its price. But maybe it's sustainable enough.