What about Manning? He was paid at a premium, and finally got a ring for it, though his team stepped up big time. Though I think he should've been like Brady and taken less, though Brady probably realized the system was bigger than him.
As for Kaep, I've been happy with Niners drafting him from the beginning, I think he's got the goods, but it may take awhile for it come together. Hopefully by his next contract, we don't overpay him, unless he helps us win a ring, then I don't mind him getting overpaid like Flacco.