Answer: humanizes and lends a sense of worth to the common beggar on the street.
According to E. Y. Harburg, the song "Brother, Can You Spare a Dime?” humanizes the beggar and lends him a sense of worth. We know this because he argues that the song "doesn't reduce him to a beggar." He also states that "it makes him a dignified human." The beggar is able to regain his agency by asking questions about his condition, and feeling rightful outrage about it.