The training moderators get and the fact that they act as a team, in addition to their individual forum experience, enables them to identify issues without being involved in the discussions in a particular section.
Keep in mind that there's quite a bit of moderation done that you don't see. I agree that sometimes more moderator resources would be very useful, but I don't think lots of moderation is a goal in and of itself. Since the PRSI section isn't a focus of the site, and because it paradoxically has required a disproportionate amount of moderation, we've adjusted our moderation policy there. Much less is now tolerated, and loss of access happens more often and more quickly.
As for the rules, we're always glad to get specific constructive feedback, so please let us know where you feel the rules could be clearer. Balancing the length and specificity of our rules is a real challenge, so we're always interested in user feedback.