My ex left me to marry another woman because of how much I earn

From a female reader

My ex-boyfriend and I had a conversation yesterday about the reason he dumped me four years ago to marry another girl he'd started dating about two years after we started dating. My ex and I started dating in 2008, but by early 2010 he met another woman who he married nine months later. He broke up with me just four months before the wedding. I was so hurt and devastated that for three years I would not give another man a chance. 

I didn't have closure because I was tormented by why he chose another woman over me. Eventually we had the conversation yesterday after we met at a mutual friend's wedding on Saturday. What he told me was shocking. He said he loved me more but decided to marry the other lady because she earned more than I did. I was earning N85k at the time while the lady was earning N250k. He figured an extra N165k was enough reason to marry her. How is this even a reason to marry? Are some men this small minded? Is this a genuine reason or he just said it to throw me off? I wanted closure but this has made me more confused.