Re: Always listening to our customers
Yep, "The Profits of Religion", 1917. However, it's worth bearing in mind that that book, along with the others in the series, were a satirical attack on various American institutions, and the way people blindly accepted them and the problems they caused. People are likely to be more familiar with his book "The Jungle", which single-handledly halved the sales of meat in the US (obviously only in the short term; people have short memories) when it exposed the exploitation in that industry. The whole point of the quote about having nothing to fear was that it was supposed to be a bad thing - the protagonist was complaining about having all his communications read by the authorities, and the faceless bureaucracy simply didn't care, giving that as the reply.
So it's worth remembering both the origin and its later use. Originally, it was a criticism of exactly the type of spying that Snowden was upset about, and it's tacit acceptance by both the government and the people. Later, it was adopted by the Nazis who took that sort of warning as an instruction manual on how to oppress people. Which gives us something of an object lesson - if you ignore warnings about surveillance and the ignoring of human rights, you risk ending up with people thinking that's how things are supposed to work, and at the extreme, Nazis.