Not nearly enough. The cost the Confederates levied for their insane war was borne overwhelmingly by the poor and the middle class, and punishing the poor and the middle class rarely achieves anything.

Within 20 years the fucking aristocrats had slithered their way back into their pre-war economic position; even less time than that to restore their political preeminence in the South. And they made it exceptionally clear that they regarded the war negatively only because they lost, and would do their damndest to return to imposing Southern norms on the Federal government; and certainly perpetuating the brutal norms of their own backwards states.