What is the ruling on money added for mediation in reducing taxes, and is this mediation considered participation in an unlawful act?

The employee is a private contractor for their employer, and their time during working hours is owned by the employer. Therefore, it is not permissible for them to work for themselves or for another entity besides their employer during this time, even if it is free time, unless there is explicit or customary permission.

Regarding the endeavor to reduce taxes and increase the agreed-upon commission amount with the broker, this is not permissible. The employer must be informed of the amount requested as commission. If they agree, then there is no objection. Otherwise, it is not permissible to take a commission without their knowledge and consent, especially if this was not stipulated from the outset.