BUREAU OF LABOR STATISTICS, Weekly Earnings, 2nd Qr. 2017 Report
Men and women's income compared
... ... ... ... ... ... ... ... . ... ... ... ... ... ... ... ... . ... ... ... ... ... ... ... ... . ... ... ... ... ... ... ... ... Difference ... ... ...
... ... ... ... ... ... ... ... ... ... ... ... ... ... ...1st decile ... ... ... ... ... ... ... ... ... 9th decile lowest $ highest $
everyone, age over 16, averaged
... ... ... ... ... ... ... ... ... ... ... ... ... ... ... Men $423 ... ... ... ... ... ... ... ... . $2,300
... ... ... ... ... ... ... ... ... ... ... ... ... ...Women $397 ... ... ... ... ... ... ... ... . $1,827 ... ... ... ... . $26....$473
everyone over 25
high school only, averaged ... ... .... ... .. ... $395 ... ... ... ... ... ... ... ... . $1,489
... ... ... ... ... ... ... ... . ... ... ... ... ... ... Men $418 ... ... ... ... ... ... ... ... . $1,661
... ... ... ... ... ... ... ... . ... ... ... ... ... .Women $371 ... ... ... ... ... ... ... ... . $1,156 ... ... ... ... $47....$505
everyone, MA or PhD, averaged, over 25
... ... ... ... ... ... ... ... . ... ... ... ... ... ... . Men $768 ... ... ... ... ... ... ... ... . $3,784
... ... ... ... ... ... ... ... . ... ... ... ... ... Women $673 ... ... ... ... ... ... ... ... . $2,610 ... ... ... ... $95.....$1,174
Men tend to earn higher wages both at the bottom of the income distribution (the first decile, above) and at the top (the ninth decile, above).
If all men and women had exactly the same work experience, it would be clearer that an injustice existed. However, men and women don't have the same experience. The jobs are frequently not the same, the hours worked may not be the same, the duration of work (years) may not be the same, and so on.
If all men and women all performed diligently, pursued advancement with the same eagerness, and so forth, it would be clearer that an injustice existed. However, note the range in both men and women with advanced degrees: $673 to $3784 -- a range of $3,111. Apparently some men, and some women, are more capable of obtaining higher wages than other workers.
I have an advanced degree (MA) and yet my weekly income tended, on average, to be in the 1st decile. Why was that? It was because I did not seek the highest wage job possible, did not seek advancement eagerly, and did not always perform as diligently as I could have. I took off time between jobs, and did not stay at any job longer than 7 years.
From what I have seen in 40 years of work is that men and women who very much want to advance as far as they can, and earn as much as they can, generally do much better than people who don't have the same focused drive. And they tend to both do quite well economically.
Because it is very difficult to capture qualitative differences in work experiences in a labor report, it is also difficult to say that any class of people is discriminated against, only on the basis of income.