Khalifa Uthman bin Affan - Pubic Treasury
Public treasury in the tune of the Holy Prophet
In the time of the Holy Prophet there was no public treasury. Whatever revenues or other amounts were received these were distributed immediately. There were no salaries to be paid, and there was no State expenditure. As such the need of a treasury to keep a reserve at public level was not felt.
Public treasury in the time of Abu Bakr
In the time of Abu Bakr as well there was no treasury. A separate building was kept aside as treasury, but as all money was distributed immediately on receipt, the treasury generally remained locked up. At the time of the death of Abu Bakr, there was only one dirham in the public treasury.
Public treasury during the caliphate of Umar