Two other quotations from JB Clark may elucidate the matter

"While there is no danger that any theory may establish a permanent reign of 
practical socialism, there is a general and not unfounded fear of agitations 
and attempts in this direction ; and systems of economic science must submit to 
be judged, not merely by their correctness or incorrectness, but by their 
seeming tendency to strengthen or weaken the social fabric.  In this view can 
that theory be the one desired which in any way obscures the action of moral 
forces in originating, developing and sustaining the institution of property, 
and which tends, however remotely, to place that institution on a de facto 
basis?"

"Recent Theories of Wages", New Englander and Yale Review, 42:174,354-364 at p. 
363

And "Does society proceed capriciously in the allotment of rewards and 
sacrifices? Do some classes fail to get the proportionate benefit that is 
properly theirs?" 
"Society tends actually to conform to the rule 'to every man the product that 
is distinctly attributable to the sacrifice the he or others in his interest 
have made'". "Distribution, Ethics of" in Palgrave's Dictionary of Political 
Economy, London: Macmillan, vol ?, pp. 596-9 at p. 597 & 599.

Nicholas J. Theocarakis