I've never gotten the impression that Americans have very much love for the intelligence community. The military, yes, the intelligence community, no.
Congress has slapped the intelligence committee before (in the aftermath of the Church Committee[1]).
It's just that post-9/11 the powers of America's intelligence agencies were tremendously increased and they were given a much longer leash.
Now that 9/11 is more than 20 years in the past they might get slapped again, but it'll probably take a bigger scandal than Snowden's revelations to do it.. and such a scandal has to happen in peace time if it's to have any effect.