"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.
If younger people see older people who haven't planned ahead and have to rely on charity, the young will be more likely to provide for the future. Today when someone plans poorly, the only consequence people see is a demand for more government.
"The Motto" is Drake's single which references the phrase "YOLO" and "you only live once". He is credited with the creation of the term "YOLO" in popular culture.