"The size of a small city, it is the largest, most secret, most powerful, and most intrusive spy organization ever created." Is it more intrusive than the KGB,

"The size of a small city, it is the largest, most secret, most powerful, and most intrusive spy organization ever created." Is it more intrusive than the KGB, Stasi or Chinese state security? Cite your source. BTW, this story is from 2 months ago.