How symbolic is the graveyard in the train driver

Unmarked graves symbolize the South African government's efforts to forget their poor people (typically people of color). After the main characters in the play begin to look for the woman with the red scarf, they find countless unmarked graves. Because none of their graves were marked, their identities were stripped. Their memories were forgotten, and they were allowed to disintegrate into the earth as if they had never walked it, reflecting the poor treatment many people of color experienced in South Africa because of Apartheid-related policies.