The whole issue is the difference between the human definition of "meaningful" and the economic definition. The former can easily create work in a downright post-scarcity situation: a new Act of Creation, a new playground or painting or programming language, will always be meaningful as long as one person other than its creator invests meaning in it. It's the economic definition that decrees "Work is meaningful if it generates Economic Value equivalent to the costs of housing, food, health insurance, and profit margins for the providers of each."