Keynes would be saying the same thing that these guys are saying. BTW what is an “independent” economist anyway?
Lord Keynes is a favorite whipping boy here but very few have actually read anything he said. He NEVER advocated permanent deficits. His prescription was to run deficits when the economy was in depression/recession (this came because the Neo-Classical Marshallian model he was taught and then taught himself did not seem to be working in the 30s and he tried to figure out why) and run surpluses when it was booming to retire the debt. Not this half-assed “Keynesian” policy.
Like Marx who ended up claiming he was NOT a “Marxist”, Keynes would be shouting he is NOT a “Keynesian”.
While what you say is true, Keynes like the typical progressive he was, omitted facts from his theories. He trumped his bogus multiplier effect while omitting what the multiplier on the other side of the equation did.