In one society, a marginal tax rate system taxes the artist with an upper rate of 92%, and they end up retaining about $50,000 of the income, with the rest flowing back into the control of the society (via its government).
In the other society, a margin tax rate system taxes the artist with an upper rate of 28%, and they end up retaining about $70,000 of the income. In this society, the artist retains control over twice as much of the income as flows back into the control of society.
"Wealth concentration" is not a policy related to markets, production, and trade. It's a policy related to taxation.