[masonic]

  They don't have franchises like the other chains. 

I don't think that's a factor. Both corporate-owned stores and franchisees use the same employee demographics, generally. Sometimes you'll find a franchisee who is an immigrant from outside the Americas and find a lot of family members and their friends making up the crew. (For example, there's a local Taco Bell that has more South-Asian employees than not.)

[rogerbinns]

The franchising is a factor because franchisees have latitude in setting their own policies for employees. eg one franchisee could offer education credits while another doesn't. Or one could pay more than another, beyond just local circumstances.