In fact, people don't "do something" because they estimate, rightly or wrongly, that they can't do anything that would make a difference. Millions worldwide protested the current US wars when they were getting started, but they went ahead on schedule. What, exactly, can citizens do to effectively influence their government anymore? If people perceive that rule of law is gone, the rational reaction is to "lie low" and hope to get thru these times unnoticed. Those still contacting congress may be old enough to remember a different USA and naive enough to not realize it is gone.
Look, if you hang with the hipsters who "consume" better media, then sure, you won't have any clue what the vast majority of the public cares about. It's not surveillance. It's whatever mass opiate has been focus-grouped out for the week.
In the meantime, though, that mass opiate is mainlined into every public space in the land on countless television monitors in essentially every place where a person has to spend more than 30 seconds. They've got no time to think about the future - they've got to be outraged about this week's 15-minute hate, or admire this week's baby, or fear this week's terrorist.
You may simply not visit those downscale places. Good on you. But Washington really doesn't care, except to the extent that you earn more money they can extract or possibly build more centralized data processing services they can mine.
The fact that Snowden may be a larger-than-normal individual news story doesn't change the fact that the story doesn't capture public attention in the face of the multitudes of other news stories continually cropping up and then going away again.
Depending on what polls you read, a majority of Americans think the NSA policy is acceptable: http://www.washingtonpost.com/politics/most-americans-suppor.... ("Overall, 56 percent of Americans consider the NSA’s accessing of telephone call records of millions of Americans through secret court orders 'acceptable,' while 41 percent call the practice 'unacceptable.')
The real news here is that Congress reacted more strongly than the public!
Tens of thousands of people called their congresspeople on a day's notice to express their support for the Amash Amendement. That amendment lost by only 12 votes. A large majority of people polled think that the NSA dragnet is infringing on privacy rights. I think that's pretty good for a notoriously apathetic populace. This issue is far from over.