I cannot see a thread about this (sorry if I missed it)...and I know that glossy mags are often 
so this post might not be that welcome...but they are asking for something practical to be done - published pay audits for co's over 250 staff.
www.cosmopolitan.co.uk/lifestyle/cosmo-reclaim-feminism/cosmo-campaign-for-equal-pay
Not sure about the "reclaim feminism" tag though, reclaim it from whom...