I'm not sure what you're getting at here: "When owners make more money, then more money is available for employees. It’s a free market thing."
That's not how it works if the employees you're referring to are the players. The salary cap is determined by league revenues. The players get around 47% of league revenues. That money is divided evenly by the 32 teams to fund player costs.
It's also not how it works if the employees you're referring to are non-football employees. If Owner X makes an extra $10M somehow I seriously doubt the those non-football employees would see a dime of it. Employee salaries are determined by market forces (i.e. how much do I as an owner have to pay someone to do a particular job), not by how much money the owner makes.
AlbaNY_Ram