Actually, I think Mill was writing prior to the time when the title of economist was in heavy use.  He was a Professor of Moral Philosophy, as was everyone from Smith to John Neville Keynes (Keynes's father).  So that's probably why he is referred to as a philosopher.

Anyway, I really enjoyed this and look forward to the next installment.  Thanks.  You and I are going to have to start a book club of some sort when I arrive in Britain.

Be nice to America. Or we'll bring democracy to your country.