Is the salary received by the brother considered permissible, knowing that he has been suspended from work for a year due to his financial problems, but the manager has not dismissed him and continues to pay his salary to discipline him, and is it permissible to take from this money in case of need?

There is no blame on the employee for benefiting from the salary as long as the manager has suspended him from work without firing him, kept him on the payroll, and paid him his salary. This is because a private employee is entitled to his wage simply by being enabled to perform services, whether work is available or not, provided he has made himself available and has not refused to work. Therefore, there is no blame in benefiting from the salary or in accepting what is given from it.