Hawzah News Agency – If a government contractor were to give a monetary gift to the government official by whom he is hired or to the government supervisor who is responsible for assessing and overseeing his work, would this be a permissible action?
All such practices that can potentially lead to the spread of bureaucratic corruption are to be avoided at all costs.
Source: https://www.leader.ir/en/book/32/Practical-Laws-of-Islam