The lack of any accountability for the actions taken by the IC both prior to and in the wake of September 11, or any real accountability stemming from the Snowden revelations, should be taken as proof that the statement/sentiment "they are keeping us safe" sufficiently moderates public outcry. Again, not to mention Snowden-level stuff is typically signed-off at the White House level, so not just overzealous IC people operating autonomously.

If you get caught in one of these scandals, you just have to wait out the news cycles in the shadows where you typically are anyway. Or you "take one for the team" like Clapper did - no doubt with a lot of legal advice from civil servant lawyers. It doesn't really matter whether or not the public tells intelligence officers/operatives "Thank you for your service!" You can also see the retroactive immunity congress granted these organizations and impassioned defenses they offered.

There is no stomach (or understanding) to demand better of the IC in any way reminiscent of the Church or Pike committee times.

I can't really fathom the magnitude of wrongdoing that would now be needed to change how these organizations think and work, or have key staff actually slapped with enduring punishments.