Anyone who is getting all his/her money from the parents after the teen years, is not learning much about budgeting and self-reliance, and the parents do that person no favor, IMHO.
I would hope, at least, that the son or daughter contributes heavily to the general running of the household, by cleaning, cooking, doing laundry, running errands, etc. which they should be doing ANYWAY, but certainly have a chiyuv to do if they are handed everything on a silver platter. I hope the parents re-consider the damage they do to their children by not encouraging them to be fiscally responsible and earn their own way in their adulthood. It’s enough if there is a roof over their heads – but to pay for EVERYTHING????