That didn't answer the question at all, it made an orthogonal, moralizing interjection.

About 45% of the world's population is 24 or younger: http://sasweb.ssd.census.gov/idb/worldpopinfo.html

How is that evidence in support of the thesis that age correlates with income or wealth once one adjusts for the increased mortality which correlates to poverty?

If you live in a mud hut without debt then you technically have a higher net worth than a recent college grad who may very well have a negative NW due to debt.