Or maybe he's talking about the USSR, Cuba, or Venezuela. All bastions of progress and high standards of living.

I am a Communist, and I will say that a slogan is neither something to build your country upon, nor something to criticise a country on. No country has thus far managed to progress past capitalism, certainly not the ones you litsted nor the ones GP listed. Marx was referring to how life ought to be under Socialism, rather than an implementation of this principle under a capitalist system, which he believed was impossible.

To be fair, communist as described will never be able to exist - the furthest it will get is the USSR stage.