"In terms of domestic politics, the current balance among Kremlin elites would be preserved. By the time Putin leaves office, Sibneft will have already become part of Gazprom's portfolio, and Rosneft, Gazprom competitor in Russia's oil patch, will have likely acquired Yukos' remaining assets. Both events will all but put an end to Russia's "oil wars," and only Putin will have the stature to maintain the peace." - Peter Lavelle, RIA Novosti
This really make sense and coming form the author who is getting cash from Kremlin. Gazprom boss is not the position in which I would like to see Putin in the future :)