Terrible, that is what I really didn't expected. (i.e. this answer) Why then Paradox guys didn't deleted this feature from the game?
These are the things that Yoda wrote me about Ai, that can using all of the games features. As we see now, it is not true, Ai still doesn't know how to use international loans. I guessing, what Yoda will tell us about Ai and this feature?
Actually there were instances of "unlawful" ai behavior in EU2 when ai was cheating on naval attrition (which it doesn't have, as well as in EU3) and colonization (have you noticed that pack of colonists sent at once to the same province?). I think it is still true for FTG and you might consider these features more "game-breaking" than "no loans proposals" thing