Hazrat Mahdi (as) will be the benefactor of all Muslims; plentiful goods and gifts will be distributed to people in his time

From Humran Ibn A’yan: “Imam Muhammad Baqr said: It is as if I see this faith of yours stirred up and stained with blood. And none but one from my Ahl al-Bayt [Hazrat Mahdi (as)] will be able to restore it. HE WILL BRING YOU GIFTS TWICE A YEAR AND GIVE YOU SUSTENANCE TWICE A MONTH, and knowledge and wisdom will be given you in his time. So much so that a woman in her own home will run it according to the book of Allah and the Sunna of the Messenger of Allah (saas).”

(Sheikh Muhammad bin Ibrahim Nomani, al-Ghaybah al-Nomani, p. 216)

It appears from the hadith that Hazrat Mahdi (as) will distribute goods and gifts to Muslims through the people he appoints; when he is among people, he will also distribute large quantities of goods and gifts by his own hand.