Few people believe the gender-pay gap is zero. And there is other evidence that women's pay is still held down by discrimination. In high-priced restaurants, for example. One study sent women test subjects looking for waiter jobs. They received half as many job offers as men who were sent in with similar resumes.
Discrimination also pops up when orchestras are deciding which musician to pay.
So bias does still exist and women still have to work more days than men to earn the same money.