Google hypergamy
Certain circles like to misrepresent it as responsible for why so many men remain single, but in reality people tend to match with those close to them in social status and earnings, with just a bit of the bias remaining unexplained by wage inequality.
Attempting to date someone who is more attractive, is much more about opinion and is relative, so is harder to quantify. Where it's much clearer how much money is actually in someone's or their family's bank account, net worth, or who makes more money.
[1]: https://en.wikipedia.org/wiki/Hypergamy
[2]: https://ifstudies.org/blog/whither-hypergamy
[3]: https://www.lovepanky.com/flirting-flings/dating-game/hyperg...