FBI admits remote install of spyware

This is sort of a niche interest of mine as I briefly worked in a position focused on limiting government control over individuals (particularly as exercised beyond the powers allowed in the Constitution) and one of the policy papers I worked on was a complete overview of government use of electronic hacking devices. The keylogger cases referred to in the article presented a clearer issue of privacy violation because an individual was actually accessing your personal property to install the software. So it begs the question, what level of privacy interest is there in online communications? Because even wanting to be on the side of pro-privacy groups, internet-based communications clearly just don't have the same level of privacy expectation as a normal communication. Why can't the government do what private companies do, without punishment? If my computer can be riddled with spyware, why can't some of that be from a government agency? I'm sure there's some clear analogy to be drawn to more traditional interpretations but I think the truth is probably that the concept of privacy on the internet is an entirely new being and can't accurately be analogized to existing concepts.