I find all this pay difference a bit odd. When we advertise a job within our organisation, we've kind of already worked out a budget for the position. We don't really give a toss whether a man or a woman or a trained chimp gets the job so long as they can do it and they fit in with the team (or, of course, lead the team).
Fact is, the salary is already worked out before the person is chosen for the role with a bit of leeway if the person is fab and pushes for a bit more but, again, that isn't gender specific. Ladies as well as men have let us know if we are paying too little and, in my experience, neither are shy about piping up about this fact...
I only recruit up to a junior management level so I don't know if this is the same for the senior management recruitment, though.
What do these other organisations do? "
Oh God, we've recruited a woman - quick, drop the salary 25% and see if she notices!" Hmmm...