This is the title of an essay by the famous philosopher Robert Nozick. You can read it here. I had a blog entry on how college professors are liberal, so this essay by Nozick might explain that. My blog entry from last year can be read here.
Here are two key paragraphs from Nozick's essay:
"Intellectuals now expect to be the most highly valued people in a society, those with the most prestige and power, those with the greatest rewards. Intellectuals feel entitled to this. But, by and large, a capitalist society does not honor its intellectuals. Ludwig von Mises explains the special resentment of intellectuals, in contrast to workers, by saying they mix socially with successful capitalists and so have them as a salient comparison group and are humiliated by their lesser status. However, even those intellectuals who do not mix socially are similarly resentful, while merely mixing is not enough--the sports and dancing instructors who cater to the rich and have affairs with them are not noticeably anti-capitalist.
Why then do contemporary intellectuals feel entitled to the highest rewards their society has to offer and resentful when they do not receive this? Intellectuals feel they are the most valuable people, the ones with the highest merit, and that society should reward people in accordance with their value and merit. But a capitalist society does not satisfy the principle of distribution "to each according to his merit or value." Apart from the gifts, inheritances, and gambling winnings that occur in a free society, the market distributes to those who satisfy the perceived market-expressed demands of others, and how much it so distributes depends on how much is demanded and how great the alternative supply is. Unsuccessful businessmen and workers do not have the same animus against the capitalist system as do the wordsmith intellectuals. Only the sense of unrecognized superiority, of entitlement betrayed, produces that animus."
Update on April 26: More info on political affiliations in higher education can be found here. Scholars who claim that social science and humanities professors tend to be Democrats defend their views.