(perhaps old Iceland would be a suitable anarchy to consider as a comparison).
If it's so damn good how come it doesn't exist anymore? If it provided such a superior governmental system providing the maximum return on investment why did it go away? Why did they instead elect to go with a king? Futher, explain how such an anarchic system can be expanded without demonstrating the exact same sorts of scaling problems consensual democracies such as ancient Greek ran into? It's one thing to rule a few 10's of thousands of people who are related, share world-models and have limited resources and quite another to rule 4+ Billion people who speak hundreds if not thousands of languages and concommittent cultural beliefs?
So, a solution is to encourage (e.g., through technological means) the break-up of nation-states into smaller geo-political groupings. --Steve