California's interpretation of employment law (ala Uber) makes it much less attractive to establish such a business.
Amazon has five fulfillment centers in California: Moreno Valley, Riverside, Redlands, Tracy and Patterson. Here are their fulfillment centers nationally:
I think he meant for this service only. The debate between "independent contractor" vs "employee" has been pretty fierce in the state legislature.
Ooops, I forgot about that. Though per that link they are definitely heavily invested in here. In the long run they don't have a choice or Macy's will beat them. (Each store here is now a fulfillment center.)