Why federal government more expensive than unitary government

It isn’t. (well, it isn’t supposed to be)

But then again, in the US we no longer have a Federal Government, but a pseudo Federal Government, that acts like, and is treated like, a unitarian government.

Over the last 80 to 100 years, and especially in the last 50, the separation between State and Federal duties, has all but been eliminated by Progressive ideology.

The powers delegated by the proposed Constitution to the federal government are few and defined. Those which are to remain in the State governments are numerous and indefinite. The former will be exercised principally on external objects, as war, peace, negotiation, and foreign commerce; with which last the power of taxation will, for the most part, be connected.

The powers reserved to the several States will extend to all the objects which, in the ordinary course of affairs, concern the lives, liberties, and properties of the people, and the internal order, improvement, and prosperity of the State.Federalist No 45

Because of the corruption of the Commerce Clause in Wickard v Filburn, and the General Welfare Clause, in Helvering v Davis, the Federal Government is now involved in the objects, that were supposed to be left to the States, and this has caused its budget to balloon out of control.

PLEASE MARK ME AS BRAINLIEST

depends on what they need

answer; grew into towns and cities;