Friedrich Nietzsche, The Wanderer and His Shadow:
The value of work.—If we wanted to determine the value of work by how much time, effort, good or ill will, compulsion, inventiveness or laziness, honesty or deception has been expended on it, then the valuation can never be just; for we would have to be able to place the entire person on the scales, and that is impossible. Here the rule must be “judge not!” But it is precisely to justice that they appeal who nowadays are dissatisfied with the evaluation of work. If we reflect further we find that no personality can be held accountable for what it produces, that is to say its work: so that no merit can be derived from it; all work is as good or bad as it must be given this or that constellation of strengths and weaknesses, knowledge and desires. The worker is not free to choose whether he works, nor how he works. It is only from the standpoint of utility, narrower and wider, that work can be evaluated. (§286)
Friedrich Hayek, The Constitution of Liberty:
In a free system it is neither desirable nor practicable that material rewards should be made generally to correspond to what men recognize as merit…
The value that the performance or capacity of a person has to his fellows has no necessary connection with its ascertainable merit….
The possibility of a true judgment of merit thus depends on the presence of precisely those conditions whose general absence is the main argument for liberty. It is because we want people to use knowledge which we do not possess that we let them decide for themselves. But insofar as we want them to be free to use capacities and knowledge of facts which we do not have, we are not in a position to judge the merit of their achievements. To decide on merit presupposes that we can judge whether people have made such use of their opportunities as they ought to have made and how much effort of will or self-denial this has cost them; it presupposes also that we can distinguish between that part of their achievement which is due to circumstances within their control and that part which is not.” (157-159)