A corporate bankruptcy is a paper death. The underlying assets live on. Killers of paper structures, in this light, are devalued villains, but a cry has gone up to identify the villain behind the pending liquidation of Hostess Brands, maker of Twinkies, Devil Dogs, Wonder Bread and other déclassé delights.

Everyone knows the answer: It was the bakers—i.e., the branch of the AFL-CIO formally known as the Bakery, Confectionery, Tobacco Workers and Grain Millers International Union. The bakers are guilty of a perfectly justifiable...