(Channeling my inner Keynesian)
10% of GDP is obviously far too small a deficit. Let's try 15%!
And along comes a Keynesian to respond:
Actually, W.C. Varones, yes that is exactly it with no sarcasm included. People always say WWII brought about an end to the Great Depression without thinking through why that was. It was because it was truly epic levels of deficit spending.
Such hubris! Keynesians think they can fix the delicate and infinitely complex system of the economy by hitting it with series of hammers, each hammer larger than the one before it. When the economy lies smashed in pieces, it's obviously because they didn't use a big enough hammer.
Keynesians are to to the economy what George W. Bush and Donald Rumsfeld are to international relations.