Perceived control is defined as a generalised expectancy for internal as opposed to external control of reinforcements." For every individual it spans between the extremes of "External"(where one believes everything is caused and influenced by external factors) and "Internal"(where one believes that everything is directly determined by one's own actions irrespective of the external factors)...The "Left-Liberal" bias of a majority of "intellectuals"(connected to socio-economic studies or otherwise) may perhaps be explained thus: Most of the intellectuals(especially the ones at the top) are loathe to admit that any situation is beyond their sphere of control. They try hard to internalise the locus of control and believe that they can "do something" to "fix the system."
... A strong internal locus of control has been shown to have high correlation with a high 'need for achievement' and therefore greater motivation.
Resignation to external factors requires considerable amount of "swallowing one's pride" and it is not that easy for the high-fliers. It would seem arrogant coming even as it does, from the most powerful person on earth to say "We know what is wrong and we're going to fix it." Sadly, we don't know (yet) how to "fix it".
Therefore, how much ever the enlightened ones may insist that these ideas are dead, a few of us hold on to the ideas of libertarianism and capitalism not because it is bereft of ills, but because we believe that in trying to fix these ills without understanding the systems, we give birth to greater evils.