You have now changed your argument from 'wage gap' to 'income gap'. Those two are not the same thing.
A 'wage gap' implies getting paid less for the same job. No good. An 'income gap' implies someone earns less than someone else. That seems perfectly acceptable.
If
- Men and women with the same employment histories get paid similar amounts - Women earn less, on average, because they work less
- Some women get paid less than men for the same job
Does it not follow that men are equally impacted by the "wage gap".
And if so, how would that influence your usage of the term?
A 'wage gap' implies getting paid less for the same job. No good. An 'income gap' implies someone earns less than someone else. That seems perfectly acceptable.