Maybe its just me and those I play with, but I would have thought being brought into a scheme by a long-standing player would be just the thing to hook a new player. My favorite part of the game is working on the politics of trying to either gain power, or prevent abuse of power. Of course working together as a team for fighting wars and battles is important, but sometimes fixing teams that aren't working well is equally as important.
I'd think too, but I tend to see apathy more than anything when I do this. Mind you, new players as a whole are usually not responsive at all. You welcome them, explain a bit what's going on, and tell them you are available for them if they have any questions, and then never get a reply. Just sucks all the will to even bother with them right out of you.