icarus, black, brown, and yellow people were simply obligated to the same responsibilities, but compensated at a lower rate.
the compensation refers to both pay and to simple recognition as human beings. it was because they held lower value as human beings among white decision makers.
like women today. i worked in tech writing companies in silicon valley in the 1980s and 1990s that paid women less than they paid men, for the same work. once i was told it was because
. . . the man has a family to take care of . . .
in spite of the fact that some of the women were sole breadwinners for families too.