That's called negotiation.
Also it's called age.
Male worker gets paid more than equivalent female, would be the headline, but the male worker could have 20 years experience and a degree in that field, whilst the female may be post-grad or with less experience... nowhere in the real world will they earn the same, but that will be ignored. For the sake of equality, the situation could very much be reversed.
This advert is utter gumph but these SJW adverts seemed to have worked for others in the past so no doubt for the sake of annoying some, they will benefit overall from the exposure.
Anyone know what One Dollar Shave Club is like (UK)? Genuinely thinking of switching anyway as Gillette are hideously expensive.