Is it 50/50 across all roles in the company or is it 50/50 for each group.
It is not unusual in a corporate world to say that "Across all the jobs we advertise this year we want to aim to see a 50/50 male to female ratio". And in general, if you aren't being discriminatory, it SHOULD balance out. As there is a population balance of about 50/50. Now obviously pilots and LAMEs are more likely to be male (although is this because girls don't see it as a viable option, when people still get surprised when a female voice comes over the PA), but FA are more likely to be female. And so on. Roles such as accountants are more likely to trend towards 50/50. And across a whole company its not difficult to target 50/50.
Assuming its across the whole company and not for each job advertised, I really feel you are all brewing a storm in a teacup.