We spend it differently because supply and demand (yeah, duh), but what I mean is that we make about the same as our parents, but the cost of housing went up, while the cost of travel and electronics went down. So we buy cheap stuff while try to figure out what to do with housing (and healthcare, and so on).

Everything that requires local labor is very expensive (partly because our expectations and requirements increased, we are willing and able to spend more, so a very high equilibrium point formed), everything that can be mass produced is cheap. (And not just because externalities are hidden, but because technological progress.)