Wiki says: “Poetic justice is a literary device in which virtue is ultimately rewarded or vice punished, often in modern literature by an ironic twist of fate intimately related to the character's own conduct."

To call this situation poetic justice is not to say that it is justice that this should happen to the United States. It is to say that if this was a literary novel and this happened to a country in the same manner then we could evaluate it to be poetic justice.

To say that this is poetic justice is to point this out so that we all might learn something very important about human actions in the real world. We Americans go blindly along "jus doin what comes naturally" without ever analyzing our actions in a critical and sophisticated manner.