That’s something that should be negotiated and agreed upon beforehand. Some women would be glad to marry that wealthy man and be paid what she feels she is worth and not based on his relative position. Which is a silly thing to even try. There is no way to quantify that. Now you’re talking about her getting 50% of the money he makes and we’re back to the same problem we started with. Just let them negotiate and consensually agree beforehand. If either person doesn’t like it then they can be with someone else.