Equal Pay for Equal Value
British law says that men and women are entitled to equal pay for work of equal value. 
In the United States, Charles Murray says that blacks and whites are being paid the same, if you take into account age, intelligence and sex:
- ... when you control for age, education, and socioeconomic status (SES), black earnings are still only 84 per cent of white earnings, which implies continuing discrimination [but] when you bring IQ into the picture, everything changes. Even if you forget about education and SES and control only for age and IQ, the black - white earnings gap essentially disappears. To be precise: when you average the results for many different occupational categories, blacks of similar age and IQ make 98 per cent as much as whites. When you control for gender as well, the figure goes to 101 per cent.