What determines the size of the salary? Should the salary be based on the employee’s education?

The quality and quantity of labor. This is the main principle of payment, which takes into account how the employee worked and how much he made. The better and more productive the work, the higher the salary.
Labor complexity and skill level. The more difficult the work, the longer it takes to learn it and the higher the wages of highly qualified workers.
Working conditions. In some heavy, hazardous industries, wages compensate for the increased workload. For example, workers of metallurgical, chemical enterprises, miners are exposed to such loads.
The social significance of labor. The amount of wages can be determined by how much the given labor is needed by the society. The state seeks to encourage those people whose work is most significant for the country.
The degree of risk. It is taken into account that in some cases an employee can risk life and health (test pilot, astronaut), in others – with money invested in the business.
The uniqueness of labor. The salaries of individual workers are extremely high due to their particular talent and popularity. Such workers include, for example, outstanding musicians, singers, and actors.