Though she _could_ get it, she would no longer want it.

She would then want no reward but the mere joy of using her voice.

And he infers that this change which would take place in the bosoms of great singers would repeat itself under the breast-pocket of every leader and organiser of commercial enterprise.

It would be hard to find a better illustration of the purely fanciful reasoning commented on in the text.
[14] The question of how much labour, _as such_, produces in modern societies is discussed in a later chapter..