Sorry, I did not see your comments. This is a new phenomenon, as large orgs try to respond to the equal pay movement for women, and minorities, but it'll take time with some industries taking the lead. For example, top female executives in the U.S. are a very few, and from has been reported, of late, they are picking tokens, and not on merit, which is begetting adverse implications in the work place.
Women in parts of the West are starting to out earn Men and have been doing better in school, whether its with regards to grades, attendence or behaviour etc... than Men for a while now.
Yours is valid, but I was referring to the Service industry and menial posts, which do not pay as high, yet are mandate, if depressing, and not traditionally male concentrated physical work, as you alluded to. Do bear in mind high risk jobs pay much higher than those in the Service industry, for example a gent working on an oil rig might make 80% more in pay than a clerk at the High street retail shop - granted the risk factor is far greater for the gent than the lass, as you pointed out.
93% of workplace deaths are Male, jobs like construction, mining, bricklayers etc... are all overwhelmingly dominated by Men. The jobs with the objectively most "harsh" conditions are done completely by Men.