That's the whole problem, isn't it? What the law is now can't be the standard for what the law should be or it can never change. But if we can't use legality to determine morality and morality in general is considered subjective then what are we supposed to do, flip a coin?
Obviously the answer is that we collectively have to define "wrong" based on logic, evidence and history. (The alternatives of basing it on "might makes right" or "loudest voice wins" may be popular but, at the risk of creating a cycle, that isn't right.)
So we need to have a debate. We need to see the evidence. How many terrorists have been foiled with this surveillance? How many could have been caught some other way and what would that have required? What are the risks to the public of allowing the government to accumulate this information? How does the one weigh against the other?
The problem is that we can't have the debate so long as they insist on keeping the evidence a secret. Which is why the secrecy itself is wrong -- it allows for unaccountable government power, which based on logic, evidence and history can lead to Very Bad Things That Must Never Happen Again.
I'm disappointed at the number of people who project their value system ("right" and "wrong") on to everyone else then call all the people that disagree with them "Brave New World"-esque Sheeple. I just heard Clinton talking about the NSA situation today on Bloomberg. He said something along the lines of: we should make sure protections are in place, but you can't expect the government to ignore e-mail, etc, when everyone uses it to communicate these days.
The reporter seemed entirely happy with the answer. So: whose ideas of "right" and "wrong" are we using?