A lot of the suggestions do actually sound pretty good at a quick glance, but have far-reaching consequences that are not instantly obvious if you don't know your tech/security/privacy or otherwise value a specific topic highly. The average HN reader is likely more concerned about privacy and less so about crime and safety than the average guy on the street, and politicians need to handle and balance a lot many more interests than only that of privacy advocates.
"Securely signed/verified devices for accessing your bank" or "increased surveillance and tracking of criminals" sound like splendid ideas and direct solutions to immediate problems. Now, how to actually implement them and how it will affect society in the long run might seem less important when you've got increasing crime rates, a slowing economy, displeased voters or whatever looming. In short, some dilemmas have very clear answers when you (willingly or through unawareness) only concern yourself with a subset of the effects of a decision, and this goes both for politicians and special interest groups. That being said, I'm very pro-privacy and it's the job of policymakers to know the details of what they're deciding on. Reality is however usually very complex and nuanced with several things being true because they all contribute a part to what's going on.
e: what am I doing, speaking like I actually know how things work? Nothing is absolute and nuance is important, but sometimes it is also very useful to simplify and generalise to get things done. If no one had any conviction, not much would ever happen. But moderation in all things.