[DoodleDawg]

Northern shipping companies had the mail carrying contract. This gave them a bottom line of profitability that could not be matched by any other company which did not have such contracts.

If there were southern shipping companies at the time the U.S. was founded then why wouldn't they have been able to get mail contracts for themselves?

[DiogenesLamp]

If there were southern shipping companies at the time the U.S. was founded then why wouldn't they have been able to get mail contracts for themselves?

Why does Boeing have a contract for their starliner? Did you see how they tried to stop SpaceX with their government influence?