Is it permissible for the imam to take his full salary if he is absent from some of the prayers?

The Shaykh : He says: If the imam of the mosque is absent from some of the obligatory prayers for a valid religious excuse, is it permissible for him to take the salary for those prayers? And if the mu'adhdhin stipulates that he will not pray in his place during his absence unless he is given a portion of the salary as compensation for that, should he be given it, or should another person from the congregation take his place?
As for one or two days, there is nothing wrong with it, because this is what is customary, and a person may be excused for an excuse once a week or something similar, and he is not required to deduct the amount corresponding to that obligatory prayer.