It's inherent.
https://archive.org/details/TheOriginsOfTotalitarianism/
> The struggle for total domination of the total population of the earth, the elimination of every competing nontotalitarian reality, is inherent in the totalitarian regimes themselves; if they do not pursue global rule as their ultimate goal, they are only too likely to lose whatever power they have already seized. Even a single individual can be absolutely and reliably dominated only under global totalitarian conditions. Ascendancy to power therefore means primarily the establishment of official and officially recognized headquarters (or branches in the case of satellite countries) for the movement and the acquisition of a kind of laboratory in which to carry out the experiment with or rather against reality, the experiment in organizing a people for ultimate purposes which disregard individuality as well as nationality, under conditions which are admittedly not perfect but are sufficient for important partial results. Totalitarianism in power uses the state administration for its long-range goal of world conquest and for the direction of the branches of the movement; it establishes the secret police as the executors and guardians of its domestic experiment in constantly transforming reality into fiction; and it finally erects concentration camps as special laboratories to carry through its experiment in total domination.
and
> Any, even the most tyrannical, restriction of this arbitrary persecution to certain opinions of a religious or political nature, to certain modes of intellectual or erotic social behavior, to certain freshly invented "crimes," would render the camps superfluous, because in the long run no attitude and no opinion can withstand the threat of so much horror; and above all it would make for a new system of justice, which, given any stability at all, could not fail to produce a new juridical person in man, that would elude the totalitarian domination. The so-called "Volksnutzen" of the Nazis, constantly fluctuating (because what is useful today can be injurious tomorrow) and the eternally shifting party line of the Soviet Union which, being retroactive, almost daily makes new groups of people available for the concentration camps, are the only guaranty for the continued existence of the concentration camps, and hence for the continued total disfranchisement of man.
> The next decisive step in the preparation of living corpses is the murder of the moral person in man. This is done in the main by making martyrdom, for the first time in history, impossible: "How many people here still believe that a protest has even historic importance? This skepticism is the real masterpiece of the SS. Their great accomplishment. They have corrupted all human solidarity. Here the night has fallen on the future. When no witnesses are left, there can be no testimony. To demonstrate when death can no longer be postponed is an attempt to give death a meaning, to act beyond one's own death. In order to be successful, a gesture must have social meaning. There are hundreds of thousands of us here, all living in absolute solitude. That is why we are subdued no matter what happens." [Rousset]
[..]
> The concentration camps, by making death itself anonymous (making it impossible to find out whether a prisoner is dead or alive) robbed death of its meaning as the end of a fulfilled life. In a sense they took away the individual's own death, proving that henceforth nothing belonged to him and he belonged to no one. His death merely set a seal on the fact that he had never really existed.
> This attack on the moral person might still have been opposed by man's conscience which tells him that it is better to die a victim than to live as a bureaucrat of murder. Totalitarian terror achieved its most terrible triumph when it succeeded in cutting the moral person off from the individualist escape and in making the decisions of conscience absolutely questionable and equivocal. When a man is faced with the alternative of betraying and thus murdering his friends or of sending his wife and children, for whom he is in every sense responsible, to their death; when even suicide would mean the immediate murder of his own family — how is he to decide? The alternative is no longer between good and evil, but between murder and murder. Who could solve the moral dilemma of the Greek mother, who was allowed by the Nazis to choose which of her three children should be killed?
> Through the creation of conditions under which conscience ceases to be adequate and to do good becomes utterly impossible, the consciously organized complicity of all men in the crimes of totalitarian regimes is extended to the victims and thus made really total.
[..]
> If we take totalitarian aspirations seriously and refuse to be misled by the common-sense assertion that they are Utopian and unrealizable, it develops that the society of the dying established in the camps is the only form of society in which it is possible to dominate man entirely. Those who aspire to total domination must liquidate all spontaneity, such as the mere existence of individuality will always engender, and track it down in its most private forms, regardless of how unpolitical and harmless these may seem. Pavlov's dog, the human specimen reduced to the most elementary reactions, the bundle of reactions that can always be liquidated and replaced by other bundles of reactions that behave in exactly the same way, is the model "citizen" of a totalitarian state; and such a citizen can be produced only imperfectly outside of the camps.