The idea of it makes sense but if this were the case every guy would be insecure about where they stood status wise. Probably would even be hesitant to get into a relationship. Maybe if she's single and trying to pick one she likes the best that makes sense but I don't even know if that's hypergamy. Also I can see a situation where she leaves the guy because he is lazy, doesn't give her enough attention, and isn't passionate about anything.

If I was doing well but another guy was doing better I just have a hard time believing girls will dump you just because of that. If they did then she probably wasn't the right girl in the first place and she'll keep playing other guys to. I'm sure there are women out there who are like this but I have trouble thinking all of them are.