Should rich men date only rich women?

That way we can avoid the unnecessary guessing game of whether the other person wants us only for our money. My family is wealthy. I'm not boasting but we are wealthy.
My brother is dating a middle class girl that my mother and I do not approve of. We can clearly see that she's a gold digger. He left his high school sweetheart who is also from a wealthy family to be with this middle class girl. His ex is still in love with him. She'd make a great addition to our family and I would be happy to her as my sister in law.
My brother just does not understand.
Should rich men date only rich women?
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