I agree and would go a lot further. If you look at tax policies over last 40 years in most of the West, there has been a massive redistribution towards the rich with policies like farm subsidies, mortgage subsidies and the like which redistribute cash from the poor to the rich.
Wealth concentration is partly the result of the ineffective of taxes in redistributing wealth. It does not make wealth distribution a primary purpose of taxes. The primary purpose of taxes is to pay for public services.