“There is no act which more imperatively requires to be performed under a strong sense of individual responsibility than the nomination to employments.”
Mill treats appointments to public office as decisions requiring unusually strong personal accountability because poor nominations can substitute influence or convenience for actual qualification.
Source details
Considerations on Representative Government (1861), Chapter V, “Of the Proper Functions of Representative Bodies,” Project Gutenberg #5669. This is historical constitutional and administrative theory rather than a current hiring standard.