Keynes demonstrated that the main cause of bouts of heavy and prolonged unemployment was not worker encroachment on profits, but the fluctuating prospects of private investment in an uncertain world. Nearly all unemployment in a cyclical downturn was the result of the failure of investment demand.
但是，想用政治的手段和平地实现整个社会财富的公有化几乎不可能，这种方法致命的缺陷在于忽略了人类不断提升的需求。其假设的前提是如果消灭利润，需求一直维持充足。