> I don't think linking to a conservative think tank a particularly compelling counterargument

Do you only ingest ideas from places that you're already inclined to believe? How do you get challenges to your beliefs?

> is inequality high and getting higher? Then the tax system should be more progressive.

> Some amount of inequality is healthy.

What amount of inequality is just right, then? On one hand you suggest that we should redistribute to lower inequality, but on the other you seem to see some kind of beneficial role, or at least a neutral role, of inequality in a society.

> The top 10% owning 80% of all wealth in the US is not.

Countries as diverse as Sweden, the Philippines, and Nigeria all have worse inequality in wealth than the US[0]. On the other end, countries like Iceland, Myanmar, and Turkmenistan have similarly low wealth inequality. I might posit that wealth inequality doesn't even make the top 10 of what makes a health society that's nice to live in.

[0]: https://en.wikipedia.org/wiki/List_of_sovereign_states_by_we...