Is it permissible for the husband to benefit from the government housing allowance or its financial equivalent if he lives in his father's house, knowing that this affects the wife's income by depriving her of the housing allowance, and is the wife entitled to demand compensation from him for what is deducted from her salary because of this?

Utilizing government housing or its financial equivalent depends on the regulating conditions and regulations, and these must be adhered to without deceit or circumvention, based on the Almighty's saying: "O you who have believed, fulfill [all] contracts." So, if the husband's dwelling in his father's house does not nullify his right to housing allowance according to the system, then there is no harm in him benefiting from it. However, if it does nullify his eligibility, then he is not permitted to take it. As for the impact of the husband taking the housing allowance on the wife's income and nullifying her eligibility for the housing bonus, there is no issue if the husband is entitled to the allowance.