Fiqh-us-Sunnah Volume 3, Zakaat and Fasting, Fiqh 3.064C.
Section : The zakah employees.
Muslims who are employed to collect zakah, either through persuasion or force, from those who are not willing to give it can also qualify as its recipients for it is better to use such people to maintain Muslim unity. Their support and their undertaking to help the government is the lesser of two evils and a preferable arrangement.