Final answer:
Unable to identify a specific book as per the provided materials, where a character's aunt believes the poor spend money on drugs.
Step-by-step explanation:
The book where the main character's aunt thinks the poor use their money to buy drugs is not explicitly identified in the provided material. Therefore, I am unable to provide the title of a specific text where this is the case. However, texts like Barbara Ehrenreich's Nickel and Dimed: On (Not) Getting By in America and Matthew Desmond's Evicted: Poverty and Profit in the American City explore themes of poverty, wealth, and misconceptions about the poor, but they don’t specify an aunt character with the mentioned belief.