Slavery and apartheid are both examples of the ways in which a country's dominant group exploits minority groups for its economic advantage. What do sociologists call this policy?

Sociologists call this policy (whereby a country's dominant group exploits minority groups for its economic advantage) internal colonialism.

Explanation:

Internal colonialism is a situation whereby there is oppression and uneven development in a country or region due to dominant groups exploiting minority groups; this leads to economic and political inequalities, a great difference in class between groups, and makes dominant groups to have more economic advantages than minority groups.