This would be exactly the opposite of the Pareto principle.
That principle states that 80% of wealth is controlled by 20% of the population. Here we have the majority of wealth being controlled by the majority of the population who cared to report. Which means that either people are exaggerating their income or TOTV has some people who knew how to save!! My bet is on the latter.
This can still only be used to get at median since the upper end might dramatically distort any attempt at average.
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