Yeah, because if you have responsibility and authority, why have anyone else at all?
If the general could just move the army's units rather than tell marshals to order the army to move, it's somewhat pointless, no?
The General has the responsibility to govern the army and the authority to issue orders to be followed. Having a button does not give authority, it's clearly defined roles and responsibilities.
The leaders roles and responsibilities are well defined, as is the General and Judge. The banker, not so much because they have no authority over their area of responsibility. Anyway, I know this is a lost argument, so back to the granary.
It was very common for rulers to tax food production and store it in case of famine or drought. Egypt is a very good example of this, they would store years worth of grain to be prepared for a bad crop.
