I forget the name of the company, but many of the concessions at terminals in US airports are basically monopolies controlled by one company. They go a long way in obfuscating it through iPads, authentic-sounding fronts (ie: the Biergarten in this example), and partnerships with celebrity chefs like Wolfgang Puck who are willing to whore their name. But in the end everything goes back to a common commissary kitchen, where they serve up cafeteria food.
It's ridiculous, and part of the reason why almost all US airports are awful, Kafka-esque centers of frustration and disappointment.
Edit: The company is OTG. They're basically what Aramark is to sporting arenas, except to airports. Get a monopoly for the captives, drive up prices, and serve up garbage.