What Harris is arguing for pertains to women who hold the same positions as their male co-workers, and do the exact same job, but are paid about 20% less on the average. It's not a matter of paying woman in the mail room as much as the CEO of the corporation, or paying the woman executive as little as the male bicycle messenger.
If you have two people working in a factory, one male and one female, and both are doing the exact same job but the male is being paid more, that's unfair. The only reason the male should be paid more is if he has seniority, in which case he would have already benefited from scheduled raises the newer female employee has yet to have acquired. Another exception would be if it were, say, a sales position, and pay is commission-based, and the male simply sells more than the female.
Other than that, yes. Fine the company and let corporations know that females being second class citizens should have ended during the stone age. It's an absolute shame that here we are, in the 21st century, and this kind of bullshit is still going on.