[cjfont]

But the importance of a job isn't what determines the salary of a worker, it mostly a function of supply/demand. A job may be absolutely critical to running a business, but if there's an oversupply of suitable applicants for the position, that is going to naturally drive down the compensation since there will be more applicants available willing to take a lower salary.

[dropit_sphere]

Live by the demand curve, die by the demand curve. The company will often have trouble when their model of the demand curve is (obviously) less precise than a worker's, and they are surprised when a worker leaves.