It can't be overstated how much of this is cultural. Quality of life is simply less materialistically driven in Europe.
If Americans give up on home ownership and luxury items, they too can enjoy a European quality of life; living in an 800sqft rental and enjoying a rich social life.
If Americans give up on home ownership and luxury items, they too can enjoy a European quality of life; living in an 800sqft rental and enjoying a rich social life.