So very long story very sort, keynes economics worked very efficiently after world war two (not for Greece, we had a very bloody civil war three times worst than world war two) and continued to work for thirty years or so until stagflation established itself and keynes economics could not give a solution. So, the so called liberals came with Reagan and they proposed the bubbles. Bubbles worked for stagflation for thirty years or so. You know the rest i think. And here we are. We have to find another solution, bubbles don't work now, except for some nasty elites.