The motive for their criticism was the same as their accusation.
The motive for their criticism was the same as their accusation. They were hopeful to reach the caliphate. Their ambition was inflamed when ‘Umar made them members of the Electoral Convention. Because of this they instigated people against Uthman and sought his assassination and for the same reason they criticized the Imam and accused him of the murder of Uthman. And for the same motive they breached their covenant by which they pledged their loyalty to him.
With Chiefs of the Tribes It is said that the Imam could have secured the loyalty of the chiefs of the Muslim tribes by showering them with gifts and preferring them in distribution. I do not believe that the Imam was religiously able to treat those chiefs as the Prophet treated similar chiefs when trying to attract them to Islam by financial preference. The chiefs whom the Imam had to deal with had adopted Islam a long time before he came to power.
They lived under the Islamic law for twenty-five years after the death of the Holy Prophet. ‘Umar discontinued paying the appeased men their share from the Zakat less than ten years after the death of the Holy Prophet. It should be mentioned though it does not have much bearing on the subject of discussion that it is doubted that the Messenger gave Abu Sufyan Aqra-a Ibn Habis and Oyaihah Ibn Hissn Al-Fuzari three hundred camels from the Zakat at the Battle of Hunain as the critics mentioned.
The share of the appeased men is to come from the Zakat. But the Messenger gave the three chiefs from the spoils of the battle and no Zakat is to be paid out of the spoils. The fifth is to be paid out of the spoils. It seems that the Holy Prophet gave the three men from the fifth of the spoils which he had the right to administer its half (which belongs to God and to the Messenger and to the relatives of the Messenger) as he found it in the public interest.
We believe that the Imam ‘Ali had what the Messenger had of the right to administer half of the fifth. But the three Caliphs before him had ignored such a right for the duration of their regimes. I do not think that the Imam could have exercised that right without bringing a problem to himself.
Granted that he had the right and the capability of giving the influential individuals from the shares of the appeased ones and that he was able to give them out of the half of the fifth without difficulty. Yet it was difficult to secure the loyalty of the chiefs through the shares of the appeased or through half of the fifth.