can u give me reasons why Mickey and Edward present social inequality? (this is from blood brothers)

Russell wrote Blood Brothers in 1981, and it was first performed as a musical in 1983. This was during the period that Conservative Prime Minister Margaret Thatcher was in power. There was very high unemployment during this time, particularly in industrial working-class areas in northern England, such as Liverpool - where Russell is from and where the play is set. Mickey and his family represent the working classes, who were badly affected by the economic downturn, whereas Edward and the Lyons family embody the middle classes, who thrived in the 1980s.