To the shit about pension contributions and varied salaries.
Rules are set by the state. Wonder why the state did not establish the simplest rule: the employer gives the employee the agreed salary, the employee himself lists all taxes, fees and salary contributions? It would seem: the problem of "grey" is solved, it is unprofitable for the employer to underestimate - this is his expenses; who has not listed contributions - the fool himself and reduced his pension.
Answer: After a person received a salary and the state stood up with the demand of the majority - a person ceases to whisper about the chamber-director and begins to be very actively interested in where such a breakthrough to the state. And if all these amounts are shaken from the director - he, of course, will hide and minimize part, but will direct dissatisfaction to himself, not to the state.