dramatic irony in tragic drama.
the use of dramatic irony in a tragedy (originally, in Greek tragedy), so that the audience is aware that a character's words or actions will bring about a tragic or fatal result, while the character himself is not
Collins English Dictionary - Complete & Unabridged 10th Edition
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There's a kind of tragic irony in that juxtaposition of facts.
The tragic irony is the wealth in these cases is trickling up rather than down the economic ladder.