Look at the placement of Ive here http://www.apple.com/pr/bios/
When a company fucks up, and is caught, and has court ordered scrutiny, it seems reasonable that the executives are going to be scrutinised.
The way to avoid this scrutiny is to avoid breaking the law.
Ive is an industrial designer, recently tasked with some UI work. His relevance to anything ebook related is less than zero.
Cook is in charge, so he has to show up sometimes, sign off on SOX paperwork, etc. The entirety of Apple's compliance effort is managed by someone else, but every project needs a Responsible Individual.
By Ive's own admission, this is false.
If anything, the percentage of the executive's time should be limited to the percentage of their profits derived from said antitrust violation. Apple has about $30B in revenue; depending on the source, Apple at most had about $300M in revenue a year from eBook sales (probably much lower than that). So 1% of each executive's time, or about 20 minutes per week, seems about right.