Men are on average a couple of years older in a relationship (https://fivethirtyeight.com/datalab/whats-the-average-age-difference-in-a-couple/ https://fivethir

Men are on average a couple of years older in a relationship (https://fivethirtyeight.com/datalab/whats-the-average-age-difference-in-a-couple/ https://fivethirtyeight.com/datalab/whats-the-average-age-di...). That extra few years of career growth can provide a strong financial incentive for the woman to become the primary caregiver, after which the salary differences snowball. I'm not sure any of the proposed solutions will address this source of imbalance.