No they have not been and they were not paid the same because of sexist discrimination. Here is one article discussing the historical reduction (not eliminiation) of the gender pay gap: https://link.springer.com/article/10.1007%2Fs13524-014-0320-...

As the article argues, the reduction is largely due to a reduction in the "unexplained part", which is usually attributed to discrimination.

You can also find other sources on Wikipedia suggesting your claim is wrong: https://en.wikipedia.org/wiki/Male–female_income_disparity_i...