What is the ruling on taking monetary amounts collected by the manager from the original employees in the administration, under the pretext of helping colleagues who do not receive bonuses, knowing that some of them pay while being unwilling?

If bonuses are part of employees' wages by virtue of the employment contract, then they are their right. It is not permissible to take anything from them except with their willing consent, for Allah Almighty says: "O you who have believed, do not consume one another's property unlawfully," and for the Prophet, peace and blessings be upon him, who said: "The property of a Muslim person is not lawful [to take] except with his willing consent," and "The whole of a Muslim is sacred to another Muslim: his blood, his property, and his honor," and "Whoever unlawfully takes the property of a Muslim person will meet Allah Almighty while He is angry with him."