Why did marxism in industrialized countries never work?

There has never been a socialist revolution in any industrialised nation, but socialism failed in most of the countries it was being tried to be implemented in for many reasons. The major reason is that those countries were so poor and did not offer much materially for the development of socialism. Marx and Engels always said that socialism would have to be developed on the basis of a great material surplus otherwise it would fail and class struggle would almost certainly start up again.