I disagree. Describing them as not borderline totalitarian is making them out to be milder than they are towards the set of people I've highlighted. They demand severe subservience by those people who face severe consequences otherwise, and that is the definition of totalitarian.
Requiring someone to prove their status for a private, low value transaction between individuals is a strongly authoritarian state. Requiring ordinary people to act as police for the state is also strongly authoritarian.
I don't believe that is a hyperbolic view.
And "requiring someone to prove status" means a lot of different things. If the issuing of status is itself done abusively, and without regard for the law (the Home Office routinely breaks the law and is routinely found to have behaved abusively), that phrase sounds much more reasonable than it is.
You would not think this unless you have witnessed the distressing multi-year effects on people of ambiguous status who are still trying to get a straight and justifiable answer out of the system designed with rejection quotas in mind, irrational decisions at times, and horrible consequences for some individuals. (Note I said "ambiguous", not "without". There are so many cases which ultimately end up resolved as "ok you're fine" after a few years fighting unlawful judgements).
The result is obvious: There are people sleeping rough because it is, essentially, the law that they must be kept homeless until their status is resolved. There are many more currently sleeping in dangerous accomodation, and in abusive relationships they cannot leave. And there are people living with life-threatening, curable diseases, where there is nothing they can do but slowly die.
I also think requiring people to earn significantly above the median wage before they can live with their own spouse is also, in my view, authoritarian. To be honest I was shocked when I discovered that. I always assumed any decent state would at least allow genuinely married couples to be together.
And in fact, EU law does allow that - it's considered a fundamental human right (the right to a family life). But it's not a human right in the UK.