Earlier quoted context omitted.
This is the lump of labour fallacy. Edit: in the form, the set of jobs we have right now is fixed and will be the same for all time. The flow of money is circular. If lower-paid people had more disposable income, they would spend more on things that employ other people. Services like restaurants or haircuts or yoga classes or personal trainers or personal shoppers or life coaches, the last three of which are pretty n…
If lower-paid people had more income they would be paying down debt, buying a better used car, paying for daycare, and maybe going on a trip or to. Personal shoppers and life coaches I think kick in a lot higher than you do.
You are quite right. Another counterargument is that a lot of household income goes into zero-sum, unproductive status signaling, a.k.a. "buying a house in a better neighbourhood", and "sending the kids to a better school".
Still, some of the extra income would be spent on things that employ other people.