Prison inmates and honey buns

Food, currency, substitute for addictions. [Link]

They are a lowly, sturdy food designed for desperate cravings and vending machine convenience. They can endure weeks of neglect and even a mild mashing in a coat pocket or backpack. They are, it should come as no surprise, especially beloved by a similarly hardy but disrespected population: Florida's prison inmates.

Inmates in the Florida prison system buy 270,000 honey buns a month. Across the state, they sell more than tobacco, envelopes and cans of Coke.

Not only that, honey buns have taken on lives of their own among the criminal class: as currency for trades, as bribes for favors, as relievers for stress and substitutes for addiction. They've become birthday cakes, hooch wines, last meals even ingredients in a massive tax fraud.
So what is it about these little golden glazed snacks? Is it that they're cheap, which is big, since the prisoners rely on cash from friends and family? That their sugary denseness could stop a speeding bullet? That they're easy, their mise en place just the unwrapping of plastic? What gives?