You cannot blame this on gender disparity. It is quite possible the same thing would have happened whether the new employee was male or female.
"look at how much leading actors make compared to leading actresses."
It is possible that both men and women go to more movies based on the actor, rather than on the actress.
sageb1 wrote: "You cannot blame this on gender disparity. It is quite possible the same thing would have happened whether the new employee was male or female."
I completely agree with the assessment by sageb1. We dealt with this issue occasionally in my engineering department. The issue was a matter of starting salary compression, not gender discrimination.
We ran into situations where rapidly escalating recruiting salaries for engineering disciplines in great demand outpaced compensation of our newest employees for a brief period of time. Every effort was made to eliminate the inequity quickly with mid-year raises if necessary. However, the problem had nothing to do with gender bias.