I have never heard any mention of Southern post being subsidized by the North. Please provide a link. :-)
There was no Southern industry to speak of.
By 1857 the South legislators had fought to achieve a lower tariff rate of about 15-18%, but as soon as the south left the Union the Northern legislators took the first opportunity to pass the Morrill tariff, which raised tariff rates once again.
Had the South stayed the tariff wouldn't have passed in the Senate.
I have never heard any mention of Southern post being subsidized by the North. Please provide a link. :-)
It was in Alexander Stephens's January 1861 speech to the Georgia secession convention - Link