For all except the very few of extraordinary gifts, the spur of gain is not only powerful, it is indispensable.
Yves Guyot, stating what he called “the third incentive of human action,” in Where and why Public Ownership Has Failed (H. F. Baker, trans., 1914), p. 424.
Illustration is a detail from a caricature by artist André Gill (1840 – 1885).