An "orthodox" Marxist analysis of capitalism says that there are three preconditions for capitalist production:
  1. Enough people who don't own anything but their labour.
  2. Enough accumulated capital to set up means of production.
  3. Wide markets for selling goods.

It should be clear that these conditions are derived from historical analysis of production. One can see with one odd glance that these conditions give little help for overcoming post-fordist capitalism.

After such a poor "definition" it's not a wonder that commies can do nothing about it but drop lousy slogans like: "In socialism production is based on human need, not on the profit." In detailed analysis this says practically nothing...