i have a theory that this is a result of the civil war. the north was run by bankers and lawyers, the south was farmers.
The domination of the north led to domination of services/finance over labor.
Had the south broken off, they would have preserved a labor centric economy.
Even back to the founding fathers, you have Adams (Mass., Lawyer) and Hamilton (NY, Banker) from the north and in the south you had Washington (Virginia, Career Military Leader), Jefferson (Virginia, Farmer), etc...