Hello, we meet again, this time for Federalist # 13, "Advantage of the Union in Respect to Economy in Government."
Once again, the Federalist's primary argument for the Constitution is that it is the only way to preserve the Union, all the states working together. That argument is assumed throughout this essay. And once again, the Federalist gives us an answer to a question raised in our current era.
Hamilton contends that there are functions that must be carried out by the national government, whether that nation be one state, one of three or more confederacies, or a nation comprised of all the thirteen states. With that in mind, a single government would be most economical, without duplicating necessary national functions three times, or thirteen times.
Modern politicians often argue that the Federal government is too expensive and inefficient. I'd counter that people governing themselves is expensive and inefficient, and worth preserving. The alternative offered is not some better Federal government. It is a Federal government that doesn't actually perform the necessary work. When one completes half the work, or none of the work, one can sure save a lot of money. Monarchy or tyranny is relatively cheap, and can look a lot more efficient, what with the trains running on time, and all those parades of marching uniforms.
But I digress. Let's let Mr Hamilton speak for himself. Good day!