Counting work hours by household seems a bit weird.
I'm married, my wife and I work fairly typical 40-45 hour weeks. So, 80-90 for the household.
My son is single. He works the same 40-45 hours. But, by the metric above, my household works twice as much. Sure, we literally do, but we have twice the manpower and twice the income. And still have the same amount of leisure time per person.
In a sibling comment, somebody linked to an article [0] that describes the wealth/free-time paradox. Basically, poor people are extremely underemployed (particularly young white males) and frequently stuck in part-time jobs (or unemployed completely). If a poor person is only able to find 10 hours/week employment, I'm at 4x that. If the poor person is single, my household is 8x because there's two of us.
I'm married, my wife and I work fairly typical 40-45 hour weeks. So, 80-90 for the household.
My son is single. He works the same 40-45 hours. But, by the metric above, my household works twice as much. Sure, we literally do, but we have twice the manpower and twice the income. And still have the same amount of leisure time per person.