Why did southern states feel they shouldn't have to help pay back state debt?

Congress approved Hamiltons plan for the national government to take responsibilty (or assume) for the debts aquired by the states during the Revolution.
-Southern states didn't want to help pay back the debts they felt the North owed.
-Hamilton gained their support through a deal: if they supported him, he would put the capital in the South. (on the banks of the Potomac River)