That is a very specific thing. Most women will say, personality etc.....
You said that poor people have fewer divorces. Incorrect the vast majority is on the poorer side. Women are initially and for a time attracted to the money. That preference is even more pronounced than men judging on looks.
Notwithstanding, what you wife may say, she is impressed with men with money. Hey I even know lizzys that are impressed by men with money.