It's supposed to work because Keene's models suggest it would work: the failure in the economy is not one of underproduction (we have dramatic overcapacity and, if anything, overproduction) but rather a lack of monetary power in the broader consumers hands, caused by the burden of private debt.

It's unorthodox, but I buy it. Or, at least, I'd rather try his solution than keep trying the failed policies of both the orthodox and keynesians.