Wait, what?

For years, the federal government bought the [dairy] industry's excess cheese and butter, an outgrowth of a Depression-era commitment to use price supports and other tools to maintain the dairy industry as a vital national resource. This stockpile, packed away in cool caves in Missouri, grew to a value of more than $4 billion by 1983, when Washington switched gears.

-“While Warning About Fat, U.S. Pushes Cheese Sales,” New York Times, 7 Nov 2010