More disposable income and larger living space.
Please read the article.
My fiancee's grandmother (from a post-Great-Depression era) wasted a fortune (~$500k) on ordering from late night infomercials and anything else they could buy (buried in the hoard were total gyms and horse saddles, stacks of unread subscriptions piling for decades, etc). Their house was a veritable hoarder home that only stopped filling when they ran out of money. I'll counter your "nuh-uh" with "uh huh".