Social issues relating to there being large numbers of poor people in a society are explored.

Notes:
This theme is typically used in relation to absolute poverty, i.e., when the poor have trouble providing for their most basic needs such as food, clothing, sanitation, and shelter.

Examples:
In "Red Beard" (1965), we saw vividly how society treated the poor in 19th century Japan.

References:
https://en.wikipedia.org/wiki/Poverty