> In particular, "market worth" is simply the term for the value at which statistically two sides (each with their own subjective "worth" estimation) mutually consenting to the transaction find together.
This is an idealistic and simplistic understanding of how markets work. Information asymmetry, power asymmetry and other structural issues (not to mention deliberate malfeasance) can lead to two employees who could produce equivalent value to a company, receiving very different offers or salaries.
Contracting companies often serve a role in creating a structure that limits the negotiating power of employees. You argue for "mutually consenting" agreements on estimating value while ignoring that fact in this particular case a middleman has been put between the two parties to limit any potential mutual negotiation.
This is an idealistic and simplistic understanding of how markets work. Information asymmetry, power asymmetry and other structural issues (not to mention deliberate malfeasance) can lead to two employees who could produce equivalent value to a company, receiving very different offers or salaries.
Contracting companies often serve a role in creating a structure that limits the negotiating power of employees. You argue for "mutually consenting" agreements on estimating value while ignoring that fact in this particular case a middleman has been put between the two parties to limit any potential mutual negotiation.