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> Of course the Gini coefficient is increasing. With more people starting more valuable companies, how could it not be?

By taxing people properly?

Impossible. The Gini Coefficient is calculated on a pre-tax basis.

There is both a pre-tax and a post-tax GINI co-efficient - it's not fundamentally part of the co-efficient.

This is further complicated by taxing at source (e.g. if your employer had to pay tax prior to giving you your pay, that likely wouldn't be counted).

Different data sources use either the pre-tax or post-tax figures.

what do you call the thing which is like the gini coefficient except for net worth instead of income?