I think the point of the question is, that we as a society try to sell the plumber's kid on the idea that everyone gets where they are through hard work and the

I think the point of the question is, that we as a society try to sell the plumber's kid on the idea that everyone gets where they are through hard work and therefore deserves what they have. But the millionaire's kid can coast into a life that the plumber's kid could likely only achieve by incredible luck combined with hard work. In light of that, the idea of the millionaire's kid deserving what they have is called into question.