It wasn't just government interference. This has a lot to do with it too.
And that it ever was.
...the traditional strongholds of male employment that paid high wages and great benefits have slowly diminished....the steel and aluminum workers, the construction workers,the autoworkers,the car salesmen, the miners, etc....
at the same time, teaching and nursing have been more in demand, and yes, women are still the dominant group in teaching, and well past dominant in nursing...
and add to the fact that many women go right on to medical school or law school....
the job market has changed....
and besides, if women get paid more than men...notice they mention "young" women and men....than it probably means that the wage base has decreased significantly...