Earlier quoted context omitted.
It's not just in US. In the majority of the world, women are extremely materialistic. Sad reality.
A bad assumption here. It could have simply been that his wife didn't want to see her children go to bed hungry or for them to lose the roof over their heads.
Materialism is a perfectly reasonable evolutionary outcome. It is nothing to be ashamed of or scoffed at. It has serious implications at the evolutionary level. If you have children you have to provide for them so they don't die.