&gt;Why don&#x27;t they?<p>If I was <i>slightly</i> more conspiratorial I would suggest that that is the 64 million dollar question.<p>In reality though, I think we are talking about two different types of knowledge here.<p>When I say knowledge is power, I&#x27;m talking about power over individuals. The type of knowledge that allows you to say &quot;Hmm, those are some interesting emails you sent, Senator. Let&#x27;s see if we can come to an agreement to make sure nobody else sees these.&quot; The type of knowledge that makes the average citizen think twice before making that Google search, or before posting a comment online.<p>Even with total info awareness, to stop attacks you need the ability to filter and flag the data you have to sound the alarm when needed. Fundamentally, that&#x27;s a data <i>processing</i> problem and not specifically what I am talking about.