Oh, well, that might cause the Chelish government to go around committing more nefarious evil deeds than they would have otherwise, both because Lastwall wouldn't stop them and because Cheliax would know Lastwall couldn't stop them so they'd try even more nefarious plots. No true Chaotic Good curse could approve such a thing!
...Pilar's curse is, of course, open to negotiations and bargaining if there's anything Cheliax is willing to commit to doing to not have that scenario end up as a net loss for Chaotic Good.