Actually, in Germany the opposite is true. The median net household income ladder is: 1. Single household (lowest income) 2. Single parent with one kid 3. Two

Actually, in Germany the opposite is true. The median net household income ladder is: 1. Single household (lowest income) 2. Single parent with one kid 3. Two adults, no kids 4. Families with one kid 5. Families with two kids (highest income) Now obviously there is a correlation with age. And also income and disposable income are two different things. But I don't think the story is quite as simple as GP seems to make it.