There has been a 'genderquake' where women are more assertive and capable of providing for themselves within the family.
Wilkinson
There is a change in the roles and attitudes of women where they want to be able to provide more and work rather than it just being the males.
Sharpe
women are becoming more ambitious.
Sharpe did a study from 1976-94. She interviewed women and found that women shifted their priorities from joining /creating families and getting married to valuing their careers more to be able to provide for themselves and go to work.