Has the Left ever considered this about political correctness?

Question

Government thought highly enough of the fine arts and sciences to give them generous funding. Yet the money came with many strings attached. Artists after 1932 were bound to the dogma of socialist realism, whereby (in the words of the Union of Writers’ charter) they were to engender “a true and historically concrete depiction of reality in its revolutionary development” and assist in “educating the workers in the spirit of communism.” Adherence to this state-mandated cultural movement was enforced primarily through the oversight of the artists’ unions. In science, where there was no tidy formula for political correctness, researchers took their work assignments from above and were expected to trim their opinions to the prevailing line.
Microsoft ® Encarta ® 2006. © 1993-2005 Microsoft Corporation. All rights reserved.

Answer 1

well... if it's out there on the internet, it must be true.

(snicker, snicker)

I wonder how Joe McCarthy and seven decades of researchers, biographers and others missed that one for so long.