Amid an historic glut, a secretive, government-sponsored entity is putting cheese anywhere it can stuff it.

That Taco Bell is developing its cheesiest products ever in the midst of an historic dairy oversupply is no accident. There exists a little-known, government-sponsored marketing group called Dairy Management Inc. (DMI), whose job it is to squeeze as much milk, cheese, butter, and yogurt as it can into food sold both at home and abroad. Until recently, the “Got Milk?” campaign was its highest-impact success story. But for the past eight years, the group has been the hidden hand guiding most of fast food’s dairy hits—a kind of Illuminati of cheese—including and especially the Quesalupa.