A two-parent household isn't going to double its consumption of everything if both parents start working. First, because wages will be depressed from the new la

A two-parent household isn't going to double its consumption of everything if both parents start working. First, because wages will be depressed from the new labor supply, the total income of the household doesn't double. Second because their tax rate will increase. Third because many things we consume in fixed units with little control over the total cost, like "health insurance". But they will increase their consumption of some things, particularly when it comes to the direct cost of working, so the family may spend more on things like transportation, clothing, child care, home care & maintenance services, food preparation, grocery delivery, etc.