Seems to me that your argument requires measuring the income of high earners, then measuring the taxes they pay. The behavior discussed involves parties lying

Seems to me that your argument requires measuring the income of high earners, then measuring the taxes they pay. The behavior discussed involves parties lying about the former number and concealing income, thus making your calculation utterly meaningless is this particular context. Presumably that detail didn't escape you, hence making this line of argument disingenuous. This article isn't about what percentage of known income is taxed, it's about enforcement resources for finding concealed or obfuscated income.