Presumably, "the top candidates" will be assessed as being higher-level employees, and will get better offers commensurate with their level? They aren't saying

Presumably, "the top candidates" will be assessed as being higher-level employees, and will get better offers commensurate with their level? They aren't saying that everyone will get the same offer, just that the offer you receive will be best and final. The fact that different socioeconomic groups approach negotiation differently has been shown to be a strong contributor to pervasive, long-standing differences in pay. This is a good step to start to address that inequity.