Earlier quoted context omitted.
Both Cuba and Vietnam only improved once they (partially) embraced capitalism. Up to that point they've been a scathing indictment of communism. Note I said communist, not socialist, which might include Scandinavian counties, and works just fine. If you disagree, you don't know your history. Get educated.
How did Cuba and Vietnam improve? What was wrong to begin with? What is the difference between communism and socialism?
I visited Cuba recently. It's improving now that they're embracing capitalism, partially.
But I still saw people plowing fields with oxen. I've seen very poor people in developing countries, but I haven't seen that first hand. The level of poverty in Cuba is pretty bad still.