Here’s a very good summary by Matt Yglesias about how right-wing ideology is succeding in proving Karl Marx right.
A juicy and telling quote:
[T]hat even though the ruling class could appease the working class by using the state to redistribute and share the fruits of economic growth it would never do so. They would be trapped by their own ideological legitimations–they really do believe that it is in some sense “unjust” for a factor of production to earn more than its marginal product. Hence social democracy would inevitably collapse before an ideologically-based right-wing assault, income inequality would rise, and the system would collapse or be overthrown. The Wall Street Journal editorial page works day and night 365 days a year to make Marx’s prediction come true. (Emphasis mine)
And, specifically for those who see Marx quotes and immediately assume that the quoter is a hardcore Marxist: it is not the left-wing commies who are the torch-bearers for Marx; it’s the right-wing who are bent (intentionally or unintentionally) on proving him right. Dismiss the concerns of the poor, the unemployed, the socially vulnerable by immersing in “survival of the fittest pulling oneself by the bootstraps” dogma and you’ll reap what you saw.