I think men and women just prioritize different things. Men might be willing to "marry down" in terms of finances but are probably less willing to do so in terms of attractiveness. And as a woman with a high-paying job, I would argue the problem is not entirely with women. I couldn't care less how much a guy I date makes (that's the beauty of being able to fully provide for myself and my kids, I don't have to rely on any guy's money). Without exception, though, every guy I've gotten serious has had some level of insecurity around it. They might say they are OK with it, but eventually they will have some problems with it. To be fair, this might be because of societal expectations, but it isn't because I care what they make.