Pay is based on background + experience + knowledge and how much company see as valuable resource.
There are literally hundreds of thousands of women from India and China earning $100k salary in California itself.
If you average out salary across depth and breadth of jobs and complain women don't earn enough I pity you. Look out for "Flaw of averages" from Dr. Sam Savage of Stanford.
If you are competent what is literally stopping from changing company ? or Start your own business ?
Complaining that you get paid less because you are women is nothing but non-sense. Show me recent graduate girls ( women ) earning less than recent grad boys.
In US you don't just look at salaries. You look at total compensation which includes PTO, 401k, holidays etc etc. Each company is different so some companies might be paying low on salary but high on PTO. So all I am saying is you can't just average out and claim that you are getting paid less.
By the way how this is not gender discrimination ? Guess US does not follow its own law. There are thousands of men also who get paid less , go years without increase what about them ? Why no movement for them ?
US is following path of Scandinavian countries and it is very sad that it is in downward spiral.