Savannah and Brunswick are huge car export ports because many manufacturing facilities are spread out between South Carolina and Georgia: Volvo, Mercedes, BMW, Honda, KIA to name a few. These ports are also the largest on the Eastern seaboard of the US. So access to shipping is probably one of the main reasons. Also major demographic shifts to the Southeastern part of the US help supply the labor pool.
Georgia and South Carolina tend to be the poorest states. The Poverty rate is around 14.5% for both. Compare that to California where the poverty rate is 12.5%. Though the poverty rate is lower, California has more people in poverty than Georgia and South Carolina combined. Anyway, using the word "impoverished" is grossly misleading.
It looks like your "wall" would line up with where most of the racist folks I've met in the South would choose to put it: where the old plantations used to be which are now mostly Black, rural, and poor.
I'll note CA has equally illiterate areas. It looks like it's the current agricultural centers, just like the South, so I guess you'll be pushing to have California pushed into the ocean once we're unable to grow crops there too and those workers are no longer useful to your wealthy area? Seems like you might be the type of thinking that got us in this problem originally.
Georgia and South Carolina tend to be the poorest states. The Poverty rate is around 14.5% for both. Compare that to California where the poverty rate is 12.5%. Though the poverty rate is lower, California has more people in poverty than Georgia and South Carolina combined. Anyway, using the word "impoverished" is grossly misleading.