The Movement For Equal Pay In The Workplace: Progressive State Laws Carry The Torch -

“Traditionally men have earned more than women in the workplace because they are considered the primary breadwinners for families. They need to make enough to support their families and allow the Mother to remain in the home to raise and nurture the children.

If businesses are forced to pay women the same as male earnings, that means they will have to reduce the pay for the men they employ, simple economics."