Generally, working-class children who stay with their parents do so to be able to save up enough money to start a fresh journey in life. Although it's still cheap to contribute to the bills like paying rent, buying groceries, etc compared to when they live outside their parent's house. But, young people like the girl in the article find it outrageous. Going through the article I saw responses from parents who admit they do the same thing. Do you think it's fine as a parent to demand bills such as rent from your working-class child because s/he stays in your house?
Basically depending on the environment which child in a family may be given the responsibility to meet the family expenses. It can be called a strategy for teaching financial management. Children of a family can be exposed to reality. How to manage oneself and how to support parents with responsibilities etc. cannot be treated differently from being subjected to such a test. A child is considered to have an education if some parents pressure the child in their family to earn a certain amount. It teaches how to be aware of responsibility.
There are many parents who think that if their children are released, they will not be able to take responsibility in the future, they will not learn the reality. They may fail completely to manage themselves. Some parents take this initiative mainly to create a foundation for the future.