Around the world,especially in transitional and developing countries,what cause the high corruption levels,and what make political economy corruption long-standing? Investigating how corruption spreads through the different levels of the bureaucracy helps to explain its persistence.The article advances that corrupt officials have to pay entry fees to their superiors.Through the mode of financing the entry fee,the article studies on the relation between financial institution and corruption levels,on the functioning financial market and its valid screening change the rents distribution in public section.Well-functioning financial institutions can decrease the political economy corruption.