Anecdotally, I just graduated from university and am gainfully employed. I'm really happy to be employed, yet I quickly realized that I have no idea what I want to do with all this money. I'm never going to be able to buy a house. I'm not particularly enthusiastic about having kids, and don't think I can afford children in the first place. I have no major life milestones to look forward to other than retirement. So why am I working? What do I do with all this money, other than dumping it in investments and generally hoarding the wealth? I've yet to find an answer.
Who knows, maybe I'll end up retiring before my 40th birthday.