Lewis on Crime and Justice

On the old view public opinion might protest against a punishment (it protested against our old penal code) as excessive, more than the man 'deserved'; an ethical question on which anyone might have an opinion. But a remedial treatment can be judged only by the probability of its success; a technical question on which only experts can speak. Thus the criminal ceases to be a person, a subject of rights and duties, and becomes merely an object on which society can work. And this is, in principle, how Hitler treated the Jews. They were objects; killed not for ill desert but because, on his theories, they were a disease in society. If society can mend, remake, and unmake men at its pleasure, its pleasure may, of course, be humane or homicidal. . . . The difference is important. But, either way, rulers have become owners.
"Is Progress Possible? Willing Slaves of the Welfare State," God in the Dock, ed. Walter Hooper, Grand Rapids, MI: William B. Eerdmans Publishing Company, 1970, p. 313.

According to the Humanitarian theory, to punish a man because he deserves it, and as much as he deserves it, is mere revenge, and, therefore, barbarous and immoral. It is maintained that the only legitimate motives for punishing are the desire to deter others by example or to mend the criminal. When this theory is combined, as frequently happens, with the belief that all crime is more or less pathological, the idea of mending tails off into that of healing or curing and punishment becomes therapeutic.
"The Humanitarian Theory of Punishment," God in the Dock, ed. Walter Hooper, Grand Rapids, MI: William B. Eerdmans Publishing Company, 1970, pp. 287-88.

My contention is that this doctrine, merciful though it appears, really means that each one of us, from the moment he breaks the law, is deprived of the rights of a human being.
"The Humanitarian Theory of Punishment," God in the Dock, ed. Walter Hooper, Grand Rapids, MI: William B. Eerdmans Publishing Company, 1970, p. 288.

The first result of the Humanitarian theory is, therefore, to substitute for a definite sentence (reflecting to some extent the community's moral judgment on the degree of ill-desert involved) an indefinite sentence terminable only by the word of those experts--and they are not experts in moral theology nor even in the Law of Nature--who inflict it. Which of us, if he stood in the dock, would not prefer to be tried by the old system?"
The Humanitarian Theory of Punishment," God in the Dock, ed. Walter Hooper, Grand Rapids, MI: William B. Eerdmans Publishing Company, 1970, p. 290.

To be 'cured' against one's will and cured of states which we may not regard as disease is to be put on a level with those who have not yet reached the age of reason or those who never will; to be classed with infants, imbeciles, and domestic animals. But to be punished, however severely, because we have deserved it, because we 'ought to have known better', is to be treated as a human person made in God's image.
"The Humanitarian Theory of Punishment," God in the Dock, ed. Walter Hooper, Grand Rapids, MI: William B. Eerdmans Publishing Company, 1970, p. 292.

. . . because they [therapeutic techniques intended to cure the criminal] are 'treatment', not punishment, they can be criticized only by fellow-experts and on technical grounds, never by men as men and on grounds of justice.
"The Humanitarian Theory of Punishment," GGod in the Dock, ed. Walter Hooper, Grand Rapids, MI: William B. Eerdmans Publishing Company, 1970, p. 293.