disparate society; stratified society
disparity in technology; technological gap; technology gap
information gap; digital divide
disparity between values of votes in different constituencies; measure of malapportionment of electorates
education gap; achievement gap in education; educational inequality
gender gap; male-female divide
marriage in which one partner (esp. the wife) has a significantly higher income or social status
social inequality; social disparity; social divide
pay gap; wage gap; wage differential
disparity (of income, pensions, etc.) between public and private employees