The best government is efficient government, whatever the size it needs to be to efficiently and successfully accomplish the tasks it has been given by its citizens.
You're technically right, but it may be that the ideal model of government tends towards a certain size; perhaps size significantly affects the extent of corruption? In any case, the more pressing matter is how to turn an inefficient government into an efficient one, heh. (Or even before that, getting consensus on the fundamental responsibilities to the citizens.)
