That may be true in theory. In practice, many parents are in an income range which makes the child not eligible for educational support (Bafög), but which also does not allow supporting the child with 1000 EUR/month. The thought of telling my parents "you are required by law to send me more money, do it!" never occurred to me. They had a house to pay off. Both my mother and father worked more hours per week then I did for university (around 4-5 hours per day, at most, and only during the semester - I did nothing for university for around 4 months during the semester vacations). When my father was the same age as I when I started university, he had already worked for 7 years and paid rent and food money to his parents. So I think paying at least the rent, tuition, and food myself was the least I could do.