I'm somewhat against attempting to shutdown/shrink the NSA. Why? because I feel people will go "oh look the NSA is shut down now, now we don't have to encrypt our emails" and if people do that it will make the situation worse. The NSA didn't do many things that criminals and other governments haven't been doing, they just did them at an incredible scale, in fact GCHQ was and still is much worse than the NSA, but that fact is always ignored. Shutting down the NSA won't solve the main problem which is that people haven't been protecting their privacy.
IMO anyone who needs to / is smart enough to encrypt their emails knows better.