Did I say it always worked? IMO USA is definitely too capitalistic right now. There are things like healthcare, utilities, emergency services, infrastructure and many more that are better of government run (or as mentioned above, at least have government compete), either because it is impractical to have real competition in these areas or because they are so important it is better for them to be inefficient than cutting corners.
But making the leap from this to communism is ridiculous IMO. Gradual improvements to the system that we know works because we live in it is the way to go.