...Comparable worth was intended to eliminate the gap between the earnings of men and women. Feminists argued that only hidden discrimination could explain the relatively lower wages in female-dominated occupations, like librarians, compared to male-dominated jobs, like electricians. Under comparable worth, employers would be required to rate jobs according to abstract notions of intrinsic value based on years of education required for a given job, the level of responsibility it entailed, and working conditions involved. In a free market, however, wages -- like prices -- are set primarily by supply and demand. Diamonds are not intrinsically more valuable than water...