He's a career politician, it seemed so obvious from the first day I heard him campaign that he was just telling people what they wanted to hear without any intention of implementing the details except for what is needed to keep up his reputation as he campaigns for his next term and then his legacy. It's the same thing from all the presidential candidates in recent history. The system is broken in some ways, and in some ways it's working ok.

I guess they are using the same justification as GCHQ; they use tools to scan everything and a human doesn't actually read ("rifle through") the majority of material.

Is it still an invasion of privacy if a machine reads my emails? Google read my emails to check for spam.

To me, the main difference is that you know about Google's automatic parsing of your emails upfront and it can therefore be a factor in your subscribing/unsubscribing decision.