Even John Maynard Keynes said “government stimulus spending” had very limited application.
Its very curious, but its quite usual for “disciples to go further than their master”. I mean that economists that call themselves “keynesian” are far greater devotees of keynesian economics than John Maynard Keynes was himself! This happens in other spheres of life. Many Calvinists are far more extreme than Calvin ever was.
He also said In the long run we’re all dead.