So how would you use desirability as a standard of measure for wages?
And what the hell would we do with the present system which is based in needs? If a job is really needed, it will be well paid, right? If only a few people can do the job, then the demand for the job will be higher and so will be the wages. Anyone can sweep the floor, right?
Also, why would someone find running a company more desirable then sweeping the floor (aside from the present wage, of course)? Which one of those two is the hardest to do?
Have you ever read the list of job requirements for a top management position? How many of those requirements can you fulfill, lixluke?