This would be a reasonable view if there weren't a systematic campaign by the NSA, FBI, and DEA to lie to judges and prosecutors about the actual source of underlying evidence.
The EFF calls it Intelligence Laundering. The DEA calls it parallel construction. Either way it is sinister and immoral and a court hasn't had a chance to rule on it precisely because it is very difficult for defendants to prove that both the prosecutor and judge were lied to.
I don't actually hold the view expressed. I've just been trying (and failing) to find a compelling way to articulate the following point: "The FISA court's warrant system is flawed because the validity of its warrants or their execution are never checked because the warrants aren't actually used to bring criminal cases."
So, I thought I'd try sarcasm. But I couldn't come up with a concise way to address the fact that parallel construction means that their info actually is used in criminal cases. Oh well, back to the drafting board...
https://www.eff.org/deeplinks/2013/08/dea-and-nsa-team-intel...
The EFF calls it Intelligence Laundering. The DEA calls it parallel construction. Either way it is sinister and immoral and a court hasn't had a chance to rule on it precisely because it is very difficult for defendants to prove that both the prosecutor and judge were lied to.