A lot of water has flowed under the bridge since I first commented.
Jeremy Bosk provided a good explanation of why money injected by quantitative easing has largely got stuck in the banking system as opposed to generating greater use of credit, without which it is fairly ineffective in terms of economic stimulus. Perhaps Anatole Kaletsky's espousal of central banks giving money directly to the personal sector is correct in the circumstances in which we find ourselves. It certainly seems more promising than the other suggestion that trades unions should have more power to exact wage increases - for anyone who remembers the 1970s, this is clearly a blind alley.