I know next to nothing about computers. I'm one of those people who, based on what I know your average every day nerd can do to someone's computer with next to no resources, just assumes that the government can and has been doing it far better for far longer.
You may be right about the exact nature of the spying, but suffice it to say, if they can (and do) collect phone and internet data from us, they probably can (and do) have all of our electronic devices "tapped" to some extent.
Why they would need that information, who knows. I'm thinking it's because they're coming for our guns, though.