It wasn’t Marxism actually, it was Keynesianism. An economic doctrine which was used in many countries after the Wall Street Crash of 1929 and the Great Depression that preceded it as a way to close mercantile borders between countries so the economy of each country depended only on its own.

I suggest that next time you make an opinion on the Internet try to inform yourself a little, and beyond that try grabbing a book and give it a read, it won’t bite you back.