I guess I just have generous parents. Different parents have different styles of parents. If my parents want to give monetary rewards to me and my sister, that's there decision. If your parents don't want to give monetary rewards to you, well that's their decision, and you have to deal with it, because until you leave home, what they say is pretty much final.
If people could make it so that other people couldn't have things just because the original person doesn't have those things then everyone would have nothing in the end.