incentive

Advanced cultures are usually sophisticated enough, or have been sophisticated enough at some point in their pasts, to realize that foxes shouldn’t be relied on to guard henhouses.

Jane Jacobs
Jane Jacobs (1916-2006) American-Canadian journalist, author, urban theorist, activist
Dark Age Ahead, ch. 6 (2004)
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On business regulation, versus self-policing.

Misbehavior and punishment are not opposites that cancel each other; on the contrary, they breed and reinforce each other. Punishment does not deter misconduct. It makes the offender more skillful in escaping detection. When children are punished they resolve to be more careful, not more obedient or responsible.

Haim Ginott
Haim Ginott (1922-1973) Israeli-American school teacher, child psychologist, psychotherapist [b. Haim Ginzburg]
Between Parent and Child: Revised and Updated Edition, ch. 5 “Discipline” (2003 ed.) [with A. Ginott and H. W. Goddard]
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I have an understanding with my husband: on any day when I haven’t done any writing, I must play him three games of chess. The trouble is, if I have been working, I enjoy the chess; if not, all I want to play is Russian roulette.

Mignon McLaughlin (1913-1983) American journalist and author
The Second Neurotic’s Notebook, ch. 10 (1966)
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In this country it is useful from time to time to kill one admiral in order to encourage the others.

[Dans ce pays-ci il est bon de tuer de tems en tems un Amiral pour encourager les autres.]

Voltaire - In this country it is useful from time to time to kill one admiral in order to encourage the others - wist.info quote

Voltaire (1694-1778) French writer [pseud. of Francois-Marie Arouet]
Candide, ch. 23 (1759) [tr. Adams (1966)]
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As Candide witnesses the (real-life) 1757 execution of English Admiral John Byng, who withdrew his undermanned ships from a naval battle during the French invasion of Minorca at the beginning of the Seven Years War. Byng was scapegoated for poor condition of the Mediterranean fleet, and court martialed for "failing to do his utmost" in the battle, which carried an automatic death penalty. In real life, Voltaire had been one of the people who attempted to intervene on Byng's behalf. In the book, Candide is so appalled by the injustice, he refuses to touch ground on English soil.

The last few words ("pour encourager les autres") are frequently quoted on their own referring to any harsh punishment used as an example to incent those who follow.

(Source (French)). Alternate translations:

In this country it is found requisite, now and then, to put an admiral to death, in order to encourage the others to fight.
[tr. Smollett (1759)]

In this country it is found good, from time to time, to kill one Admiral to encourage the others.
[Source (1859)]

In this country it is found requisite, now and then, to put one admiral to death, in order to spirit up the others.
[tr. Smollett/Thornton (1920)]

In this country it is good to kill an Admiral from time to time to encourage the others.
[Modern Library ed. (1920)]

In this country it is necessary, now and then, to put one admiral to death in order to inspire the others to fight.
[tr. Morley (1922)]

In this country it is a good thing to kill an admiral from time to time to encourage the others.
[Random House ed. (1928)]

In this country it’s good to kill an admiral now and then, to encourage the others.
[tr. Bair (1959)]

In this country it is found requisite,now and then to kill an admiral, in order to encourage the others.
[tr. Cameron (1997)]

In this country they think it's good to kill an Admiral from time to time, to encourage the others.
[tr. Gordon (1999)]

The entrepreneur, in the classic image, was supposed to have taken a risk, not only with his money but with his very career; but once the founder of a business has taken the big jump he does not usually take serious risks as he comes to enjoy the accumulation of advantages that lead him into great fortune. If there is any risk, someone else is usually taking it. Of late, that someone else […] has been the government of the United States. If a middle-class businessman is in debt for $50,000, he may well be in trouble. But if a man manages to get into debt for $2 million, his creditors, if they can, may well find it convenient to produce chances for his making money in order to repay them.

C. Wright Mills (1916-1962) American sociologist, academic, author [Charles Wright Mills]
The Power Elite (1956)
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A deadline is negative inspiration. Still, it’s better than no inspiration at all.

Rita Mae Brown (b. 1944) American author, playwright
Starting from Scratch: A Different Kind of Writers’ Manual, Part 4 (1988)
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Throw a few chairmen of the board in jail for polluting the air and water, and you’ll see the pollution disappear quite rapidly. … You would also probably see some pretty drastic prison reform.

(Other Authors and Sources)
Pete Stark, Jr., in “Tumult & Shouting,” San Francisco Sunday Examiner & Chronicle (2 Jan 1972)

Usually when people are sad, they don’t do anything. They just cry over their condition. But when they get angry, they bring about a change.

Malcolm X (1925-1965) American revolutionary, religious leader [b. Malcolm Little]
Malcolm X Speaks, ch. 9 “With Mrs. Fannie Lou Hamer” (1965)

Where there’s a whip there’s a will, my slugs.

J.R.R. Tolkien (1892-1973) English writer, fabulist, philologist, academic [John Ronald Reuel Tolkien]
The Lord of the Rings, Vol. 3: The Return of the King, Book 6, ch. 2 “The Land of Shadow” [The Orc-driver] (1955)
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Applause is the spur of noble minds, the end and aim of weak ones.

Charles Caleb "C. C." Colton (1780-1832) English cleric, writer, aphorist
Lacon: Or, Many Things in Few Words, Vol. 1, § 424 (1820)
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