Public retirement system – the social security in every country has established the public retirement system, which has the role to support financially the retired citizens – with a monthly or weekly pension. Usually people deposit social security installments each month from their salary, in order to use these once they retire. But in some countries the public security system also gives minimum pensions also to people who were not able to due to one or another reason. Also it supports the health invalided people, to whom social pension is also released.  So far the best type of public retirement system is the one with personal deposit accounts, where every working person can get clear idea where is social security installments are and in what amount. The public retirement systems with mutual pension funds create corruption and financial frauds – this is why these are presented mostly in the developing countries.