On the contrary, fashion is a good example to show that this way of thinking is quite simplistic. There is a base of rather low salaries, of models, taylors etc, where women form a huge majority.
Then there is the top, with high earning designers (mostly men) and supermodels (mostly women).
So if we monitor such a fashion house and their contractors, we'll find these huge disparities, not in salary, but in gender proportion.
Normally they should "address" this widely discriminatory situation against men - or be forced to: a pattern of "crime" is very easy to establish :)

Another good example is nursing.
In Australia man nurses form 7.9% of employed nurses in 2005 down from 8.4% in 2001 (acc. to this study).
The proportion of man nurses in Quebec in 1995 was 8% - in the other provinces, it did not exceed 3.4%. (acc. to StatCan). The same can be said about Britain: numbers of registered male nurses here have seldom exceeded 10% of the total. (Journal of Nursing Management. 11(4):242-249, July 2003. WHITTOCK, MARGARET PhD, BSsc (Hons) )  despite some progress during the last years.

According to the mentioned "equality" methodology, monitoring should point out to this hugely  discriminatory situation and measures should be taken to encourage and facilitate men access to this profession. Quotas should be imposed on recidivists, and heavy penalties applied upon non-observance of these quotas.

Right?
Wrong. Women and men don't always have exactly the same talents, qualities, preferences in life, expectations from a career. There are plenty of men who thrive in taking care of the poor and the sick or in teaching, or women in management jobs. But if in certain professions the proportions are unbalanced, we cannot automatically infer discrimination.

Should I get started on races now? Why whites are so discriminated as football players in France and the UK, especially at the top?
(no, I don't necessarily say blacks are athletic and whites intelligent; just that such disbalances are not always due to discriminations or other evils of the world)

As a general rule, we cannot treat the society as a body that we stretch and adjust as we please. Taking care of the extreme cases, life threatening situations is one thing, falling into victimization, social engineering and Procust-bed reaction (especially as we base on incomplete analysis and a dire lack of competences) is a completely different one.

Free at last! Free at last! Thank God Almighty, we are free at last! (Martin Luther King)