I understand your point, but I don't see any reason to believe it. It seems to me that it's in the NSA's (and every other gov't organization's) best interests

I understand your point, but I don't see any reason to believe it. It seems to me that it's in the NSA's (and every other gov't organization's) best interests to do everything in its power to increase its own reach and influence. It's naive to assume they are working against their own best interests unless you have some sort of evidence to back that up.