The USA (and maybe other countries) seem to think that police states are only police states if the police are consciously, actively, only interested in evil. Most of those creating and maintaining police states are not evil. They are just doing what they can within the system. The individual actions make sense to someone trying to do good. They just neglect liberty a bit in order to get things done and then a bit more and then a bit more but don't see themselves as creating a new police state.
The USA constitution has fairly good protections in place. McCarthyism gives a extremely clear example of the dangers when those with power allow a few to abuse the system. And we have many more than a few abusing the system now.
I doubt most of those in the KGB wanted the KGB to have more and more power to be evil. They wanted the KGB to have more and more power because they saw challenges to what the KGB wanted to accomplish and giving the KGB more power would help. And they really believed that this would be good for people. If they could just stop the troublemakers then thing would be better.
I believe most of those required to carry out the security theatre of the TSA are repulsed by what they have to do. They need a job though. And so they do what people do in those situations they justify the behavior to themselves. They attempt to justify their behavior to themselves in order to make it tolerable to participate in such behavior. Many will suffer as the attempts to mask their true feelings are far from perfect. A few will actually enjoy mistreating others. And some will not see a problem - there are plenty of people that happily go along with things many others believe they have to be corrupt to go along with (but that assumption is wrong, they see things differently and most often have overly simplistic world views that work pretty well for keeping them happy, I just do what the TSA tells me and whatever they tell me must be good because they are in charge).
Not that this is 100% of what everyone thought that everyday, but this is the main model of those police states. Sure you have a few deranged people that see a system ripe for abuse and they have power and take advantage of it. And sure, authoritarian police state administration will attract more power hungry psychopaths that don't have much respect for individual liberty. But I still think the main force is just people trying to get by and if the rules are such that authoritarianism and disrespect for individual liberty are allowed they go along because such thinking has been made acceptable (not because they think they are being evil and they like it).
The police state apparatus builds an ethos that freedom is risky and must be monitored - not to be evil - but to help. Those in the USA perpetuating the police state are not doing so to promote big brother government. They just got trapped into a system where they see the dangers of freedom and they believe they are on the site of right and good.
The danger of authoritarian government was understood. The constitution puts barriers in place to protect society. But those with power see the barriers are mere inconviences to avoid. In the last 10 years the extent of our slip into a police state has been dramatic and is critically dangerous to our society. But the most important point is once you reach a point where this is beyond all reasonable debate it is far far far too late. Corruption of liberty must be addressed early on. If the police state is allowed to grow it becomes nearly impossible to turn back. I fear we are already too late in the USA. But who knows where that fulcrum really is. Maybe we are not too late.
Totalitarian thinkers don't like freedom of citizens, so they are likely to outlaw using tech that doesn't allow the police state full access. So the most totalitarian states won't allow citizens legal access to protection from the state. My guess is many states are going to take extreme totalitarian views on this. It sure seems the USA couldn't be more totalitarianism in their current stance on this issue. It appears to be that you have no rights to freedom if technology is involved.
It is hard to separate that thinking from evil-big-brother-thinking but I think it is a mistake to think that those wanting big brother style government intrusion think they are trying to create the big-brother-government from Orwell's 1984. They have convinced themselves that really we are just trying to get a bit of information why can't you just trust us to be different than all those warnings you have that actions such as ours (police state) are bad. We are not like all those others that did it for bad reasons (either in history of literature) we are doing so because how else can we control dangerous risks. This is true for the SWAT team members crashing into innocent people's houses over and over and over. And it is true for the politicians that really seem unable to both appeal to voters and think effectively about policy.
And is probably most true for leaders of those at the DHS, NSA, FBI, CIA, NSC and in the White House. They are so fearful of all the risk and they have so much trust of their government organizations that they can't see the obvious comparison of what they have created and a police state. They know they will be blamed if catastrophes happen. Eliminating the risks of those events in the short term is nearly 100% of their focus. Concerns about individual liberty just don't enter their thoughts. They don't see themselves as big brother. They see that as ludicrous, not worthy of consideration. Certainly not something to moderate their behavior. That is the risk. That is the danger. And we have already created such a powerful police state that dialing back the big brother thinking is going to be extremely difficult, if it is possible at all.
The recent news on the NSA has sparked outrage and fear but this doesn't seem like much news to me. The police state mentality of the last 10+ years has carried with it this type of thinking. I find many of the previous revelations much more troubling than this latest one.
Related: Librarians Standing Up to the Madness (2009) - Freedom Increasingly at Risk
(2008) - Security Theatre Thinking is Damaging the USA - Watching the Watchmen (2008) - Tired of Incompetent Government Harassment (2007) - Failure to Address Systemic SWAT Raid Failures (2007) - Lawmakers now use so much 1984 Orwellian speak you can't trust what they say (2005) (check them with trustworthy authorities EFF and others)