You should read paragraph number 5 again. It concedes that at least 25% of the reduction in reported income is due to working less.

Yup. One of the options for a middle class couple is the non breader winner of a middle class couples could decide to work less.

I reread your comments (upthread). I imagined you were trotting out the "discouraged rich people" trope. My apologies.

Well, to be fair to you, I was trotting out the discouraged rich people trope.

It's rich people who have the most elastic working hours and income.