Hmm... get payed to RP...
I want to ask you, why do you play a game? Any game.
For the loot? For the currency (trias in this case).
In my oppinion you play it because you (the person behind the character) enjoy it.
Of course, you feel some inner joy when you happen to find an incredibly rare item, or when you make a certain ammount of ingame currency but those are some of the reasons behind the game being exciting for you. And if you think about it... here's the bad news... the loot is only pixels. So, I guess it is not the loot that makes a game worth playing, it is the feeling you get while playing it.
Ok, so my point is: You play the game for a moral reward that is in some cases related but not strictly to pixels.
On the other hand, you get the same reward when you RP. You meet people, you have fun with them, you have fun being inside the skin of a character that you try to role play the best you can, in short, you are enjoying the game.
So, why would you need pixels to feel enjoy something that is enjoyable anyway?
If somebody doesn't enjoy RP, you can give them all the trias in the world and they will still not RP. Or they will do that for the trias and they will suck at it.
So, IMO, we should leave RP to those that like and want to RP and not force it by making people do it, or by giving them rewards. RP is a reward by it's self.