Andy observes that the income distribution between the richest and poorest people in the population has remained fixed for decades. He concludes that the rich stay rich and the poor stay poor. Is this a valid conclusion, or has Andy missed something?

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The Answer of Andy observes that the income distribution between the richest and poorest people in the population has remained fixed for decades. He concludes that the rich stay rich and the poor stay poor. Is this a valid conclusion, or has Andy missed something?

Andy Observes That the Income Distribution Between the Richest and Poorest