The difference between sexist men and "modern thinkers": $8,500 a year

“It could be that more traditionally-minded men are interested in power, both in terms of access to resources – money in this case – and also in terms of a woman who is submissive.

“Another theory suggests that employers are more likely to promote men who are the sole earner in preference to those who do not – they recognise that they need more support for their families, because they are the breadwinner.”