The main agenda is to seek out underpriced labour, and continue to pay them as little as possible.
In effect, to profit by arbitraging against the discriminatory policies of other employers.
To give a concrete example, you set up a new corporation and you make a big deal of the fact that you welcome women.
You pay them say 50% less than what it would cost to hire a man. You are, of course, also willing to hire men at 50% less than the norm, although you don't get many takers.
Eventually, you end up with a woman-heavy workforce paying 50% less than a corporation with a man-heavy workforce, and you pat yourself on the back as an employer who proudly hires a very large proportion of women.
But because the women are concentrated in a different corporation than the men, there can be no equal pay claim that would boost women's pay to the level of men in the same occupation and sector.
Rinse and repeat for basically any other "diverse" group.