The NSA has access to financial records? What's new? The US government can always just get warrants for those kind of details any way.
I'd wait for details of the documents to be released before with start speculating based on "former employees", but it wouldn't surprise me if PP was/is implicated and colluded. All the other big company seem to have already any way, so it shouldn’t be a surprise.
It'll be interesting to see if anything comes of this supposed 'NSA amnesty':
http://www.bbc.co.uk/news/world-us-canada-25399345