Is it permissible for a contracting company to reduce the salaries of its employees below those agreed upon with the government entities it contracts with, and what is the ruling on the work of employees involved in the hiring procedures in this case?

The work of a contracting company has details: If the agreement is to supply employees from its side, and then it contracts with them for a lower wage, this is permissible under certain conditions. However, if the agreement is to provide employees with specific salaries determined by the government entity, then the company is an agent and it is not permissible for it to profit anything from that. Reducing employee salaries is considered a forbidden act, a betrayal of trust, and a lie, and it is not permissible to assist in it in any way.