Yes there is a gender disparaty even within blue collar jobs - as I mentioned before, I am yet so see a woman aspire to be a 'binman' and feel it was some kind of achievement.
But also, I live in the northeast, am from a working (maybe even under) class background. I know that women in blue collar jobs who have been proven to be underpaid in the same job than a man are promised to get that back, though with the recession it is slow to coming - this is discrimination.
But on a bigger scale it is worth looking at the evolution of such discrimiantion - from that you can see it is not malign, but is still negligent.
In this I mean, in the days when women were only 'allowed' to work before they were married - or when they were 'matrons' - the man was still the 'breadwinner' (apoligies for the numerous inverted commas - there may be more to come however) and as such it was an organic process that made paying men a 'living wage' more of a priority than women, as they literally were, shoehorned into the nurtuting role, which as we all know, was literally priceless, in both sense of the word.
As things have developed, things have began to change - the equal pay act was a huge step in challenging this (benign/malign) prejudice (if you see what I mean by that).
There can never be 'equal pay for all' in areas that are internally competative, it all depends on the will and competativness of the ^individual - and on average, men want to get one over, over their collegues than women do, who I said before, are happy enough to earn a good living wage.
There are plenty of things to challenge and examine in the texts I will recommend now, but also a lot that is very informative about the unique situaltion we find ourselves in today in the West. I find that many of my traditiona femninist collegues reject reading these texts on point of principle. What I believe however is that it is essential that the many great minds within feminism read them for themselves, for it is only by knowing the argument that you can challenge it, if that is needed. Relying on old and hackneyed critiques is not enough.
So here they are: You can buy all these very cheaply on amazon but you can read bits in these links. I studied (and critiqued) Divided Labours) them at the LSE under Helena Cronin 2 years ago. The 'ev psych' paradgim is not a one way street.
books.google.co.uk/books?id=51nw-OSu4lIC&dq=Kingsley+Browne&source=an&hl=en&ei=6RSPSrC7Es-gjAed6vXaD Q&sa=X&oi=book_result&ct=result&resnum=7
books.google.co.uk/books?id=vq_0BUkcZ5MC&dq=Kingsley+Browne&printsec=frontcover&source=an&hl=en&ei=6 RSPSrC7Es-gjAed6vXaDQ&sa=X&oi=book_result&ct=result&resnum=6#v=onepage&q=&f=false
And latterly the new book by Susan Pinker www.amazon.co.uk/gp/search/ref=pd_lpo_ix_dp_am_us_uk_en_susan.020pinker.020the.020sexual.020paradox_ gl_book?keywords=susan%20pinker%20the%20sexual%20paradox&tag=lpo%5Fixdpamusukensusan.020pinker.020th e.020sexual.020paradoxgl%5Fbook-21&index=blended