The Path to CBI Independence

Every once in a while, talks about a motion or a bill to increase the Central Bank of Iran’s authority circulate in the media. This means that the ruling establishment is aware of the need for a more powerful and independent central bank. But the question is why in all such motions and bills, the CBI is given authority over private legal and natural persons? 
Is it because private legal entities such as importers, exporters, the banks and the exchange offices believe CBI does not have the authority and independence? Have the powers and authorities of the central bank been threatened by those people? Or what the CBI needs is authority and independence before the interference of the government, the parliament, special commissions and committees consisting of various state bodies, and in short, independence vs the government?