Lol. Efficiency is associated with communism? And if you want efficiency you indirectly want communism?
Diversity is a beautiful thing and nor do you need centralized power for everything. At the same time, even you must understand that the way we divide out country up is many ways quite harmful to its existence. Even look at the way we vote. A vote for a democrat here in texas is a vote wasted because once the state is carried, it is carried (texas is overwhelmingly republican). If the election were just a flat national majority, no votes would be wasted and you would have true representation of what the people want (they say 400 votes in one county carried George Bush to victory, when there are thousands of votes against him in other states that simply didn't matter at the end of the day once the state was carried). There is also this idea that "gee its their problem" when talking about other states as if we don't all share the same national debt, the same air, the same water, the same threats.
People praise diversity and de-centralized power, but every country has an agenda to get as much power and wealth for itself as it can.
This is why we're racing towards 'one world government' and consolidation of power -earlier in powerful nations, and then emire; now in regional consolidation (NAFTA, EU, etc.)