The hypocrisy of fiscal economics:
When there is a crisis in the real economy, we are told austerity is needed to restore confidence & encourage growth - the neo-classical economic solution.
When there is a crisis in the financial serves sectors we are told what is needed is liquidity & stimulus to restore confidence & encourage growth - a (narrow form of) Keynsian response.
So its not so much Keynes has been rejected, but rather its only applicable when the rich are in trouble!