> That is impossible because the state has access to nuclear weapons, gigantic drills, thousands of intelligent people whose sole mission in life is to break down that wall, nearly infinite budget, etc.

Those generic statements are great and all until you realise that every year, dozens (hundreds, thousands???) people disappear without a hint of a trace and the government is powerless to do anything about it and can't find them.

Or when a large, wealthy company commits crimes (or just government officials sometimes), all they have to say is "we lost the data" and suddenly, there is nothing that can be done about it, it's lost to the ether for ever without any possibility to find out anything about it.