families usually used to be big up till about 1900, I suppose, and it was common for older kids to help bring up young ones. It doesn't necessarily take away your childhood, it just gives you things to do that aren't so common any more. There must be worse things than kids learning a bit of responsibility. Do only children ever learn the art of rubbing along with other people?
The cost might well be a problem, though. Never mind the shoes, how are you going to afford foie gras for 19?