Answer:
Literal language uses words exactly according to their conventionally accepted meanings or denotation.
Figurative (or non-literal) language uses words in a way that deviates from their conventionally accepted definitions in order to convey a more complicated meaning or heightened effect.
In this case, the word "raw" illustrates the characteristics of the nouveau riche of the 1920s. As people who have acquired wealth in only one generation; they, therefore, do not have the cultural background in which refinement and good taste is acquired.