What is the ruling on money earned by a father from his work in a tourist restaurant, which involves giving tips to bus drivers with the knowledge of the employers and tourism companies, in addition to the father himself receiving tips with the employer's approval?

The question includes several points: First: The father's wage (a monthly salary and a percentage of the daily profit) contains an element of ambiguity regarding the wage, which has been prohibited by the majority of scholars. The contract must be rectified in the future, and for what has passed, he is entitled to the wage of the like (اجرة المثل). Second: What the father receives in gratuities or what the restaurant owner pays to bus drivers is permissible if the employer permits it. Third: There is no harm in the father's money and what he earns from that work as long as the employer has permitted him to take those gifts and is content with them. As for the wage for the work, there is no harm in it, but he is only entitled to the wage of the like for what has passed, and the contract must be rectified for what is to come to eliminate the ambiguity.