According to Wikipedia
- The major influences on Keen's thinking about economics include John Maynard Keynes, Karl Marx, Hyman Minsky, Piero Sraffa, Augusto Graziani, Joseph Alois Schumpeter, Thorstein Veblen, and François Quesnay. (Well I've heard of Keynes and Marx)
- In August 2015, Keen endorsed Jeremy Corbyn's campaign in the Labour Party leadership election
His analyses have been described as flawed by other apparently 'sensible' economists, but I suppose you could say "they would say that wouldn't they if he has dismissed them as wrong"
I think there are much better ways of achieving QE