I can't help but agree. Maybe it's because I don't have kids that I don't understand, but I thought that it was generally the parents' legal responsibility to feed and shelter the kids until they were 18.
My own experience was pretty much that of the OP's daughter's current situation: parents looked after me until I had finished full time education, and any money I earned from part time work was mine to spend. Spending my Saturdays stacking shelves in Tescos seemed to be enough to teach me the value of money, as well as motivating me to do well at school.
Not to mention about learning a lot about people in the process which is hugely important.........