Reduces, not eliminates. Presumably it is quite easy for employees to establish, for example, that all black employees at a company are poorly-paid compared to

Reduces, not eliminates. Presumably it is quite easy for employees to establish, for example, that all black employees at a company are poorly-paid compared to similar white employees. This makes redress possible. In the U.S. it is quite difficult to establish that, even if one has a strong suspicion that it is true, and so redress is rare.