Hegemony implies cultural hegemony, uniformity of taste. Sometimes when I'm in a Costco far from home, I wonder about cultural hegemony. But, whether I purchase at Kroger or Costco, my paper towels look the same. I'm not throwing my support away from my local region by buying a better and cheaper paper towel at Costco. It's not clear to me that it's a plus for the regional economy for consumers to buy from a gigantic grocer rather than a gigantic box store.
In the past 10 years I've increased my support of local producers; I buy local produce and meat and local arts and crafts.