There is NO WAY Palin could have “just not said anything in favor...” Couric is no idiot - she’d have sensed the opening and gone in for the kill.
That said, I believe it could go either way. Palin may have indeed supported TARP at the time. I’m not so sure she got, shall we say, “full disclosure”. I’m pretty sure a lot of people didn’t.
You are getting close to a consistent position. Maybe she supported it because, like most Americans, she didn't have a clue about what the hell the TARP Bailout was all about. But to believe that she was being a cheerleader for it while at that same time having some core principle objection to it is to accuse her of being dishonest.
Which version would you prefer to believe?