PEOPLE care about money because it is important for survival, even more so when you are in a family of, like the guy mentions in his comment, 4.

Also, I'm still curious as to how you inferred from said story that his wife wasn't also working to provide for the family since her husband couldn't hold a steady job. It was a stressful time for everyone involved, and when there are kids to provide for in the picture, even more so.