In theory. Very likely not in practice, or have you noticed how well we are guarding our southern border?
People in the Border states would sneak that stuff in. They even acknowledged at the time that it would have been impossible to patrol the entire border.
Plus you ignore the effect that making their dollars go further would have on these states. Missouri and Kentucky would have decided they want to be on the CSA side, because it would have been in their better economic interest to be so.
The Confederacy would have continued to switch states until it looked something like this.
The economic reinforcement zone of the great lakes and New York would have remained, but the rest of the nation would have done better without being controlled from New York.
Maybe because most rational people don't depend on newspaper editorials for their economic information.
The economic information which shows the clearest picture of what was happening is in the book "Southern Wealth and Northern Profit by Thomas Prentice Kettell. You've seen it's excerpts before. BroJoeK has also posted links to other sources, and when you cut away all the bullsh*t he tries to spin it with, it shows exactly the same thing.
The South was the dominant export engine of the Nation, and all their trade was being controlled by the people in New York and Washington DC with a vigorish of 60%.
The newspaper articles just let you know what prominent people of that time were thinking.
You can post your economic data any time.