You are ok with the government collecting all of this information from these companies and believe they won't search it (well, without a warrant)?
If so...have you ever worked in a big company (say Chase/Verizon/S&P/Enron/etc) and known the tech guys there who control the data bases?
Because I have, and it is easy to search things (even just for fun) in a data base you control and manage and no one is the wiser.
I had over 5000 servers under my management and you can bet people working there could do all sorts of queries (especially when a system was having issues and you needed to test things out....). And that is not even touching the emails and network traffic heading out.
At one job I knew who was having an affair with who (smaller company), who was losing their job and when, etc (domain admins have a lot of access). If you think that data is not exposed and being examined then I don't know what to say.
You take all that info, along with all the info from other sources, and put it in one place and I can pretty well guarantee it is being read and seen - and guess what? You will never see the server logs to know otherwise because that is classified 
Oh sure, maybe the head of the org is not searching it. But those 'lower level' folks are and you will never, ever, know about it unless someone gets that info and shows you.
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