So, their availability in schools is positive news to students. They can buy foods and non-food supplies cheaply. Staff members on a budget can also benefit from vending machines. Since foods are low-cost, the staff can plan on their spending every day.
This was an event in Vonnegut's own life, and the novel is
considered semi-autobiographical. from his time as an American soldier and
chaplain's assistant, to post war and early years. It is generally recognized
as Vonnegut's most influential and popular work.