Re: They're doing their job.
They are not doing their jobs. Not in a way that anyone could possibly consider successful.
The entire point of discreet, discriminating, covert government surveillance is that they are able to focus vast and cunning resources on extracting hidden data from dangerous/threatening people. Not to place everyone under surveillance in case they might need that information one day. That is a poor use of resources. Setting the house on fire to keep warm, not to keep from freezing to death, just to be maybe a little warmer, for a very brief period.
A reasonable analogue would be a city Dog Catcher, tasked with catching loose or stray dogs, decides to catch all the dogs, regardless if they are stray, loose or dangerous. Not only has his task become impossible, it is expensive, resource intensive, ensnares innocent dogs, inconveniences the Humans close to those dogs, generates great ill will and a sense of need for active defiance, leaving people no choice but to hide their dogs, deeper and deeper, making the Dog Catchers job that much more impossible.
That Dog Catcher and his employer would be removed from service as their activities ultimately resulted in a scenario that actively undermined the mission of the service. So to should the agents and agencies responsible for mass surveillance of a largely innocent public.