Based on recent economic developments, the super-rich don't have much to complain about.  Their wealth is skyrocketing, public policy favors their interests, and just eight men now possess the same wealth as half the world's population.  But they do face problems, including how to spend the enormous amounts of money that they are amassing, how to find hardworking and deferential servants, and -- above all -- how to stave off popular resistance or even revolt.