I don't suppose Herr Wolff provides any specifics as to what are and why regarding "the right mix of spending cuts and tax increases"? I do not believe the existence theorem has been satisfied or that it can be.  It is much more likely that a Gödel like proof of the impossibility of such a solution could be found. He is basically invoking fairies. After all, he talks of 'inflation rates' in a country caught in a debt-deflation death spiral.

"It is not necessary to have hope in order to persevere."