I don't think this is the biggest factor. Men's income relative to women's [1] and the lower amount of steady jobs [2][3] could be somewhat more important for long-term relationship though [4]. In the 18-30 age range, women make as much as men.

1. https://www.payscale.com/gender-lifetime-earnings-gap

2. https://www.nytimes.com/2017/05/31/business/economy/volatile...

3. https://blogs.chapman.edu/crean/2015/09/29/new-research-anal...

4. https://www.nytimes.com/2018/07/17/upshot/when-wives-earn-mo...