25 January the President of Kazakhstan, made a very important statement. He announced the constitutional reform is the shift of power in favor of the Parliament and Government.
Today Kazakhstan is a presidential Republic. The President appoints the Government and leaders of regions. They are accountable and subordinate to the President. Presidential decrees have the force of law. Thus, the whole executive power lies in the hands of the President. He has considerable legislative power.
Reform implies fundamental change of the political system. The Government ceases to be part of the presidential vertical. Now is appointed by Parliament and is responsible to the Parliament. The Government will form a parliamentary majority. Practically, the Government will act in the logic of a parliamentary Republic.
Moreover, the scope of activities of the Government and the President are clearly divided: the President is responsible for strategic issues, defence and foreign policy, and the Cabinet of Ministers for economy and social sphere. Thus the power of Kazakhstan will have two equally valid branches: presidential and parliamentary–governmental, with its resources and activities.
Why does Nazarbayev? Why cuts its own power?
Seemingly paradoxical decision. But Nazarbayev all explained in a statement. Before the reform has two tasks.
The first task is to increase the efficiency of management. The concentration of power and resources at one point effectively if there is a shortage of resources (the concentration of resources to guide them to the most important tasks) and control system is simple enough that one point could be able to adequately respond to all calls.As the complexity of the system decreases the effectiveness of the system, so as to take all decisions at one point simply cannot keep up with this pace. Decentralization of power is needed. This task and decides to reform. Now considerably more questions could be resolved without the intervention of the President.
The second task is much more important. This increase in stability of the political system. The sustainability of any system depends on balance. This is especially important for the elite. Selfishness elite you cannot restrict external mechanisms. And the consequence of unfettered self-interest elite you can easily find out by looking at Ukraine. Selfishness elite may limit only vnutrijelitnyj balance when each of the elite groups in the name of self-interest restricts the actions of other groups. 
In post-Soviet countries, where the main Institute is a State vnutrijelitnyj balance expressed in terms of a balance of powers. Strengthening the balance sheet even provides Nazarbayev its reform. So that the reform will make the Kazakh State more efficient and viable.
But the question still remains: why reform now Nazarbayev President? On the one hand, while he was in power almost no unity of command flaws become apparent. On the other, Nazarbayev‘s credibility is so large that it will remain a key figure in the political system, regardless of any formal powers.
To fully answer this question can only himself. But we have a hypothesis of Nazarbayev is reforming not for themselves and not for themselves, but under those and for those who come after him. Hardly anyone from politicians to be able to cope with such a concentration of powers which is by Nazarbayev. And this personality scale Nazarbayev–he thinks not about power, but about the country. Not about today, but about the future.