Internal strife
We tinfoil hat people always imagine that "They" are trying to find ways to snoop on us. In reality there are many competing agencies (who hate each other) who all have their own reasons to get into our stuff. It's not just the hatred, they have many other reasons not to be motivated to share data with each other.
As in this story, officials regularly complain that their detection ability is being undermined by technology X but what they really mean is that it will defeat themselves as agency Y but it won't be such an obstacle for agency Z (who they hate) and who will thus laugh at them.
Biting the hand that feeds IT
