Earlier quoted context omitted.
What interest does a state government have other than the interests of the people of the state. Your assertions about the role of the federal government represent one view of that role, and a very historical one at that. That doesn't make it wrong, but it would probably be more useful to say something like "I continue to believe that the view of the some of the framers, and many of the land owning class in the 1700's…
The state government is a consolidated view of the people in that state. That doesn't mean that everybody in the state agrees. But, it does mean that there are some settled issues at the state level. A state's senators should be representing those settled views. Senators did represent the people but once removed. The people can be swayed by a smooth talker or a pretty face. The state legislature selecting senators en…
> A small federal government ensures that what the people of one state want has absolutely zero effect on any other state.
This is ridiculous oversimplification. The people of the states move, they travel, they do business, they have family and friends, across state lines. They also dump waste, use water, pollute the air, kill the wildlife .. across state lines. Recently, procurement of health care across state lines has also become a matter of increased necessity, thanks to the decisions of some states.
> A large central government is costly, ineffective and overbearing.
and is also the only thing that can provide an effective counterweight to interstate and transnational corporate power.
At the big picture level, I think you're fundamentally missing that the context that provided most of the reasons for the original existence of states at all has morphed so dramatically that continuing to insist that the only true conception of the USA is as a rather limited aggregation of states is just denying both time and reality.
We had a civil war to deny some of the people in some of the states the opportunity to hold others as slaves and/or leave the union. When the disagreements between states reaches certain levels on some issues, it is not possible for the union to continue unchanged. Those disagreements will lead either to war or dis-union. That was true long before the federal government expanded as it has in the C20, back when we were much closer to the loose aggregation that you seem to prefer.