You cannot rewind your speech to hear what you wispered two years ago or do a quick search to see everyone you have ever wispered to. Without secure encryption

You cannot rewind your speech to hear what you wispered two years ago or do a quick search to see everyone you have ever wispered to. Without secure encryption the collection and storage of data by the NSA will give them those capabilities on data. So in your scenario it would be like always having a mic pointed at you, always being followed by wired informants and having everything around you bugged.