Intellectual labor has no cost. The price is determined solely by the market and employees' awareness of it.

Factors affecting the price of a person in the labor market:

public statistics;
communication with friends / acquaintances / colleagues;
own experience of trading with employers;
minimum human needs;
perhaps a groping experiment - trying to sell oneself at an overpriced price;
tax burden in the region;
In general, in the labor market, the job seeker can either offer his own price or agree to the price set by the employer.
The IT Support Engineering is responsible for taking offer application and technical support to the users.

For beginners, a more frequent case is when they are offered some kind of price, due to the fact that Supply> Demand.
Actually, the trends in these prices create statistics. If Demand> Supply in the market, each new deal (hiring) moves the statistics up. If Supply> Demand, each trade moves the statistics down. It is very consonant with the principles of exchange trading, only there is more chaos here.

For example, according to statistics, the price of junior labor is lower than other categories, because there are more people who want to work in IT than jobs. Prices are correlated within a closed ecosystem (exchange), in this case a city.

Accordingly, the next level that can fluctuate the price in the market is a pump / dump (artificial increase / decrease in the price) of assets through the injection of information in the media, persuading people to lower or increase their prices. For example, Vasya read on the Web that the average salary of a junior is $ 1000, and he gets $ 400. Vasya went to ask for more and look for a vacancy for $ 1000.

I have described the general trends in the pricing of assets (people), but what asset does the employer want to buy? Of course underestimated! If, when choosing a very experienced specialist, the question of price is often in the last resort, within a reasonable framework, because a person is taken not for margin, but for closing risks, then a newcomer is needed precisely for the margin and as long as possible.