Am i correct to say that productivity cannot be objectively measured by money but only expressed in money's terms. There is not a prouctivity-o-meter which i can use to find the producitvity level of someone.
In valuing an object we cannot say that i value dancing three times more than jumping rope.
However when dealing with productivity though, a buisness frim can say someone two times more prouctive than someone else expressed in dollars.
Productivity in dollars is not an objective property of a worker.
It is a property of a combination of the worker, the productive process, and the market. That is, fixing any two factors it is still possible to change productivity in dollars. If you want, you can even add the Fed as another factor (because it can change productivity in dollars even if you fix all three previous factors).
So a more objective measure of worker's productivity would be the output of the worker given fixed process, measured in produced units.