A quick warning, it has been a LONG time since I last played this game so my memory and understanding may be a bit off.
I will also go with Ramza. Most reasons have been stated. What I liked most about him was that he was willing to 'slink away' as some people would put it. Yes he could have vote for his honor, to try and take a scheming user off the throne or any number of things. However, all that would have done was hurt the people of the country. And if memory serves Ramza wanted to protect those people not harm them. Personally taking one for the team is more 'honourable' in my opinion than fighting to the 'end'.
He also knew that Delita's desire was much the same as his(only Delita was more politically cunning). Delita would not aim to cause open strife that would hurt the common folk. In addition we know that Delita's reign was a peaceful and prosperous one(if memory serves).
The question is, what would have happened had Delita gone 'mad with power'? I personally think that, if he heard of it, Ramza would at least want to try to talk with his friend.