What made the Salwens notable is that Hannah's parents were moved by her argument. The family cut their expenditures in half, so they could give to others more. They have written about their new life in The Power of Half: One Family's Decision to Stop Taking and Start Giving Back.
What particularly struck me in their story is that the family's biggest move was to sell their "dream house" in suburban Atlanta and move into a house half that size. I don't know the exact sizes of these houses, but I have seen suburban Atlanta upper-middle class neighborhoods, and they can run to quite large. Kevin Salwen, the father in the family, reported the unexpected effect of living in their large dream house:
In our big house, we stopped communicating. We'd scatter to different rooms, far from one another physically and spiritually. The house actually began to weaken our love, or at least our ability to express that love.
I think the richer classes in America are often afflicted with this unexpected problem: their houses are too big for their families to live in as families. The much-desired structure actually undermines family life.
Perhaps a silver lining of the bursting of the housing bubble is that more people will want more modest houses, with manageable mortgages. And the unexpected benefit will be greater intimacy in their families.