I agree with the author in the sense that the working poor are definitely "taking one for the team" so to say. They carry out the menial labor that is required in our society, but not everyone wants to do. Unfortunately because we don't live in a utopia, they suffer for it. They make great sacrifice by doing jobs they often know don't lead to advancement in society, because they know that it has to be done by someone. The conflict theory applies to both Ehrenreich's book and our society in the real world-there are numerous inequalities in the workforce, and the allocation of resources for individuals in our society is distributed unfairly.