Re: who it is that doesn't trust us – and why
All of the above, absolutely. A bit more detail into the government part, because that's the context for which the final comment seemed mostly directed at....
...for a large part of the development of liberal democracy, there were a lot of 'gentlemen's rules', and while a lot of principles about seperation of power, avoiding conflict of interest etc did eventually get codified into constitutions and laws, there are still a large number of practices that evolved based on an understanding that the people in politics would operate from a basic code of honour. There have always been shysters in politics, but representative democracy opened the door to them in volume, since large populations give rise to both larger democratic institutions as well as a higher ratio of voters to representatives (making it easier for shysters to get elected from among a large voter pool who do not know them personally, only from propaganda). And now, many of these gentlemen's rules are no longer observed, and those observing them are taken advantage of.
As more and more shysters entered politics for their own benefit, the potential grew for more collusion and corruption between legislative bodies, administrative bodies and large business interests. Again, corrupt businessmen, politicians and administrators are nothing new, they just became supercharged by the "economies of scale" provided by population and industrial growth. What was already correctly identified 50+ years ago as the 'military-industrial complex' is now a supercharged cancerous growth that also includes tech companies (which are, first and foremost, data-gathering/processing aka spying companies).
All of this has been built on asymmetric information - in spite of the liberal mantra of transparent government and private personal life, the reality is that everyone's private life is available to those in power with a few clicks of a button (what's a warrant requirement after all, when judges are politically appointed??), and Freedom of Information legislation barely scratches the surface of the inner workings of government. (In addition to which, all the entities tasked with oversight and enforcement of the laughably weak rules in place are, themselves, branches of government).
So saying "Governments don't trust their electors - they might vote for the wrong party next time" is also itself only scratching the surface... every government employee is beholden in some way to political will to keep or advance in their job, and every politician is beholden to the lobbyists who pay for their election campaign (and yes there are many honest exceptions but far less than the actively corrupt or those simply keeping out of the line of fire). If people really knew what was going on behind the scenes, they wouldn't be voting for a different party, they would be storming the Bastille.