I think these companies speak out of both sides of their mouth on this topic. And varies greatly depending on the level you are speaking with. An example I would state is Eric Schmidt, I believe he had a very cooperative relationship with the US Government, but also spoke against mass surveillance. (I also think that is just the nature of the role when you are in his shoes.)
At any major tech company, not even internal networks are considered to be safe, and things are encrypted to sometimes paranoid levels, that's costing A LOT (not only in processing power, that's nowadays less of an concern, but with a much increased complexity of their infrastructure).
And before you ask - major threat model they target is governments sponsored hacking.