The reason is the states that would like to do it cannot survive a week without federal funding. They would lose not only funding but trading rights with other states. That means no goods coming in or going out. The state would wither and die in a very short period of time.
- total payments to the federal government exceed total receipts from the federal government
- has a coastline which facilitates foreign trade
- has an economy variously ranked as the 7th to 10th largest in the world; Spain, Canada, Brazil, Russia, and India survive with smaller economies