So, ignoring for the moment the actual substance of the post, I just want to mention that this is a cool use of diffchecker, which I have not seen before.
I've wanted git blame for laws for years, but I suspect what would end up happening is one scapegoat would be selected for each bill to make all the changes, so it would just be that one person on each bill and it wouldn't really tell us who made a change or why.
It would be political, for sure, but it still might be informative to see who claims credit for which part.