Wait a second. That means that Tia was innocent all along. At least in the case of the kidnapping.
Sure, she didn't care in the slightest, but that doesn't mean that she was responsible for it. Much least that she was the mastermind.
She was just a convenient scapegoat. Even if being completely unawere of the world aroun you is something bad, especially for a ruler, that doesn't mean she was actively malicious.
Seriously, just how mucf money could a princess spend in her whims to actually affect the economy of a empire?