All the factors you mentioned can only come into play when there is low presence of government in such a country because in advance country where there is price regulations and control, allowing a free flow market won't work and can't operate with in such a system, the government will control price of commodity. Unlike in your country may be there is no regulations just like in my country too, were market goods owners give any price they sole wish to give and don't give a demo about the consumers own feelings, this results into high inflation also.