This is not true. Depending on the wife for income prevents her from focusing on having a large family. Without the assistance of a grandparent or some expensive nanny, this tends to limit the number of children in the family to 2 or 3.
Also, women working has driven the price of houses up, so it's difficult to get by with one working parent now. Women have less of a choice to work now, and more of an obligation.
This doubling of eligible workers also drives down the salary of everyone, making men pull in less money, further forcing women to work whether they want to or not.
Not to mention how expensive large vans/suvs are to actually drive them around.