Not sure about the ignorance part except as only the willfully ignorant embrace Marxism. I'm thinking ideological. Like this gem from the same source
Just as the commandment Thou shalt not kill sets a clear limit in order to safeguard the value of human life, today we also have to say thou shalt not to an economy of exclusion and inequality. Such an economy killsAn economy of inequality is by definition a real economy. Should a surgeon get the same pay as a burger flipper or as a welfare parasite? Solid Marxism. This from a man who although he has no salary as such lives in a palace every bit as luxurious as the fanciest of lifestyles other of heads of state. I'm guessing he doesn't cook his own meals or do his own shopping either.
Ideological for sure, but ignorant as well .the idea that free exchange economies depend on the good will of those with the money it does not. Govt control depends on that ..