If .2% of earners REPORT INCOME greater than $x, they paid tax on that!

We get the percentiles straight from the IRS data.

There's this idea that people report they made $100 MM to the IRS, but are like, "Well, I only want to pay tax on $300k of that." And the IRS is like, "Sure."

You wouldn't be in the top .2% if you only reported incomes of $300k to the IRS. You'd barely be in the top 2%.

Again, like I did 4(?) posts above this one, I'm going to ask for evidence, because I've heard this assertion a lot but never seen any specifics. Surely if they had plenty of tax avoidance strategies, you would be able to point to their version of the Double-Irish. Maybe even be able to estimate the magnitude of dollars avoided in taxes?

You have zero evidence for this.