Economist Steven Levitt [1] on why working at McDonald's pays more than drug dealing [2] (link via Classical Values [3], which in turn was found via Instapundit [4]). Yes, he does cover this in his book Freakonomics [5] (excellent book by the way) but still, it's fun to watch his presentation.
[1] http://www.freakonomics.com/blog/
[2] http://www.youtube.com/watch?v=5UGC2nLnaes
[3] http://www.classicalvalues.com/archives/004680.html