The reason why DC VIPs get special service is because the cable business (Comcast) is heavily regulated ("managed"), so these VIPs have a big influence on Comcast's business.
Maybe I'm missing your point. But if "the free-market brigade" got their way, the DC powers-that-be wouldn't be able to (a) push Comcast around, or (b) push around Comcast's competitors (making life easier for Comcast).
So then Comcast would have no reason to give the VIPs the red carpet treatment.
But the one critical aspect of privacy that Posner misses is that it can be used to hide dissent. And that is crucially important to any free, liberal society.
Political freedom is meaningless without the freedom to conspire for a change of government, in favor of opposition candidates, for changes in laws, in general to work to overturn the powers-that-be...without those powers-that-be knowing about it.
I'm with David Brin in thinking that privacy is, in general, overrated - so long as officials and those in power are willing to be equally transparent (which they aren't).
But this one crucial aspect of privacy is absolutely critical to any semblance of democracy.
They didn't say to use C and C++ for mission-critical systems, they said to learn them.
Learning low-level, primitive languages (including assembly) teaches valuable skills that are applicable in many other areas. Every well-seasoned programmer should know some of these low-level languages - well.
That said, despite the fact that you're correct that these languages have little or nothing in the way of "safety features", they nonetheless have a critical role to play in the software ecosystem. Almost all "high level" and "safe" languages today are implemented in C or C++, and for very good reasons (having to do with memory efficiency and fast execution).
As such, they are not "among the very worst in existence" - they merely have strengths and weaknesses, and places where they're appropriate, and not appropriate.
Just like all the other languages.
[FWIW, I have written a great deal of real-time code that runs close to the metal. Some of it even has flown in rockets.]