I think it has everything to do with Economics. This represents the day to day life of people in the past - Spending, living, housing, etc.
OK man,I posted that I thought it was interesting and recommend it be moved because I didn't want to be rude and point out that what you posted is a well known hoax,most,if not all of the points are factually incorrect. If you don't believe me,click here: http://www.snopes.com/language/phrases/1500.asp and you'll learn some real history.