Heh, I was thinking about that, how would something like this sound:
So we have knights, barons, counts and so on, right? Well, how often did people like counts or barons actually train for wars? Knights pretty much lived for battle (Especially in Calradia), so they would be readier for battle, but they're still knights, so they're not exactly rich. But, nobles are, rich that is.
So, with this, there could be an interesting game mechanic in the making: Knights are great fighters, but have poor equipment, while nobles are poor fighters, but have great equipment.