138 The requirement of all Member States acceptance, being primary law, makes the ECB immune to the incidence of political changes. Hahn, Hugo J. (1991), p. 814. In some Member States this would require constitutional amendments. At the same time it is, according to Herdegen, difficult to visualise higher restraints on democratic principles or a stronger entrenchment against majority rule between nations. Herdegen, Matthias J. (1998), p. 21. This view can also be criticised – unfortunately it is difficult to believe that the ECB in practice would be the most extreme example of an infringement of the implementation of the principle of democracy.
139 Hoffmeyer sees the accountability problem in relation to the question of ultimate political control and considers the central banks functioning in national systems having at least two formal strings to the political system. Firstly, their rules have been stipulated and can be revoked by parliaments. Secondly, central bank leadership is nominated politically and in almost all cases for a limited period. In addition monetary policy decisions are subject to public opinion in the sense that they must be understood and in the long run accepted by the public