During the war, United States debt jumped into the billions (IIRC) for the first time. I think when Johnson took office it was on the close order of two billion dollars gold. The amounts spent by both governments was unprecedented, as we might have imagined, and therefore their tax regimes were radically altered by exigent need -- the South's more exigent than the North's.
If you want to make something of it, Longstreet and Lee, in the last days before Appomattox, had a dreary correspondence about orders from the Richmond government for the impressment of gold. Needless to say, a peacetime Confederacy wouldn't have proposed such an article be included in their constitution.
I don't buy any of that. but there was something else:
"The answer perhaps is that the problems were not so much unseen as uncomprehended. At bottom they were Yankee problems; concerns of the broker, the money changer, the trader, the mechanic, the grasping man of business; they were matters that such people would think of, not matters that would command the attention of aristocrats who who were familiar with valor, the classics and heroric atttitudes. Secession itself had involved a flight from reality rather than an approach to it....Essentially, this was the reliance of a group that knew a little of the modern world but which did not know nearly enough and could never understand that it did not know enough."
Walt the Coming Fury, p. 438-439 by Bruce Caton
Walt