Attacking Reinhart-Rogoff to revive the spending machine.
The Reinhart-Rogoff duo have admitted a math error while defending their core argument, though we've never considered their 90% figure to be dogma. Their main contribution was to remind politicians amid the post-crisis Keynesian spending blowout that public debt isn't a free lunch. It has to be repaid, which means a country must either spend less, tax more, grow faster, repudiate the debt or inflate it away.
The Keynesians are attacking Reinhart-Rogoff with such vitriol now precisely so they can rev up the spending engines once again. In their economic model, more government spending equals more GDP. So governments must keep spending more no matter what they spend it on.