re: Game of Thrones S4:E6:"The Laws of Gods and Men", HODORS ONLY (no book readers)

I have 2 questions for the board. Let me first say that although I do watch GOT every week, I am not as astute as many of you are, I miss many of the little things that occur on the show and obviously don't have the keen eye or ear that many of you have. With that said, here are my 2 questions.

1. The Iron Bank. If the IB has most of the money, can we assume that they have a bad arse army protecting it? Why not just attack it and steal all the gold? I have not heard anything on any of the episodes about their army. Can anyone enlighten me on this.

2. The whole poisoning of the king. So the fool gives Sansa the poison filled necklace. Little Finger gave it to the fool. G-Maw Tyrell had knowledge of it as well. We still don't know who actually put it into dipshit kings cup, do we? Why go through all that trouble to get poison into the wedding? It's not like each person had to pass through a TSA checkpoint to enter the wedding. Anyone could have brought it into the wedding. With that said, do y'all think that this was all set up by Tywin? Did he have to make sure that it came out at the trial that Tyrions wife had the necklace? Is this all the doing of Tywin? If so, I can see 2 advantages to killing the king and doing it this way. One advantage would be that the king is dead. he sucked as a king and was going to ruin the kingdom. Tywin had to know this. The second advantage would be that Tyrion was blamed because of Sansa and Jaime would have to get into check with Tywins master plan. Yes? No? Maybe?