USWNT soccer filesfor pay discrimination

Earlier today it was reported that the 5 star players on the U.S. Women's National Soccer team have filed a law suit against the U.S. Soccer federation for pay discrimination. The complaint alleges that the the players earn a fraction of what the player on the men's national team makes sometimes as little as 38% less despite their superior on the field achievements and higher anticipated revenue. "In 2017 alone, the USWNT will generate $8 million more in revenue for U.S. Soccer than the USMNT. The gap between projected revenue — $23 million for the USWNT and $21 million for the USMNT — in 2016 stands at $2 million, but, as demonstrated by the revenue detail, the USWNT’s revenue is set to nearly double what the USMNT will haul in ($17 million to $9 million) in 2017." So the question is why are they not being payed as much let alone even more than the mens teams based off of the revenue brought in. I believe since they are bringing in more revenue they should be make more than the mens national team. What are your thoughts the pay discrepancies?