Something of Kevin Carson's that I just found:
If libertarians like to think of “a fair day’s wage” as an open-ended concept, subject to the employer’s discretion and limited by what he can get away with, they should remember that “a fair day’s work” is equally open-ended. It’s just as much in the worker’s legitimate self-interest to minimize the expenditure of effort per dollar of income as it’s in the employer’s interest to maximize the extraction of effort in a given period of time.Read it all here.
For the authoritarian “libertarians” who believe “vox boss, vox dei,” this suggestion is scandalous. The boss is the only party who can unilaterally rewrite the contract as he goes along. And it’s self-evidently good for the owner or manager to maximize his self-interest in extracting whatever terms he can get away with. Oddly enough, though, these are usually the same people who are most fond of saying that employment is a free market bargain between equals.
For most of us who know what it’s like working under a boss, it’s a simple matter of fairness that we should be as free as the boss to try to shape the undefined terms of the labor contract in a way that maximizes our self-interests. And most of the Wobbly tactics grouped together under the term “direct action on the job” involve just such efforts within the contested space of the job relationship.
Further, these are the very methods a free market labor movement might use, in preference to playing by Wagner Act rules.