Alfred Marshall, Principles of Economics (London: Macmillan and Co. 8th ed. 1920). https://en.wikipedia.org/wiki/Principles_of_Economics_(Marshall_book) https:/

Alfred Marshall, Principles of Economics (London: Macmillan and Co. 8th ed. 1920). https://en.wikipedia.org/wiki/Principles_of_Economics_(Marshall_book) https://en.wikipedia.org/wiki/Principles_of_Economics_(Marsh... ---8<--- The relative fall in the incomes to be earned by moderate ability, however carefully trained, is accentuated by the rise in those that are obtained by many men of extraordinary ability. There never was a time at which moderately good oil paintings sold more cheaply than now, and there never was a time at which first-rate paintings sold so dearly. A business man of average ability and average good fortune gets now a lower rate of profits on his capital than at any previous time; while yet the operations, in which a man exceptionally favoured by genius and good luck can take part, are so extensive as to enable him to amass a huge fortune with a rapidity hitherto unknown. The causes of this change are chiefly two; firstly, the general growth of wealth; and secondly, the development of new facilities for communication, by which men, who have once attained a commanding position, are enabled to apply their constructive or speculative genius to undertakings vaster, and extending over a wider area, than ever before. It is the first cause, almost alone, that enables some barristers to command very high fees; for a rich client whose reputation, or fortune, or both, are at stake will scarcely count any price too high to secure the services of the best man he can get: and it is this again that enables jockeys and painters and musicians of exceptional ability to get very high prices. In all these occupations the highest incomes earned in our own generation are the highest that the world has yet seen. But so long as the number of persons who can be reached by a human voice is strictly limited, it is not very likely that any singer will make an advance on the £10,000, said to have been earned in a season by Mrs Billington at the beginning of last century, nearly as great as that which the business leaders of the present generation have made on those of the last. ---8<--- "But so long as" holds no more.