Holy Russia?

This article from The Daily Telegraph reports that the revival of the Orthodox Church in Putin’s Russia has a shadow side. It raises all sorts of basic questions about the church and the state being in bed together.

Can a state church ever be free of corruption? Can a state church ever be free of moral compromise, doctrinal compromise and spiritual compromise?

I think there’s a name for this. Isn’t the heresy of the church becoming the king’s puppet called Erastianism?