mainly macro: Why Sen is right about what is being done to Greece

I've copied the first paragraph of the below article into this post. It's an evaluation of the current situation in Greece and the EU from an Oxford economist named Simon Wren-Lewis.

mainly macro: Why Sen is right about what is being done to Greece

At first sight the negotiations between Greece and the Troika seem to be simply a battle about resources: how much of the pie that is Greek national income their creditors should receive. There have been many similar types of battle over the years - what makes this one unusual is that the creditors have a unique weapon on their side. With primary surplus approximately achieved, Greece’s bargaining position would normally be extremely strong. The Eurozone creditors would be desperate to salvage what they could from their foolish decision to effectively buy some privately owned Greek government debt. The only reason the Troika is able to call the shots is that it can threaten to eject Greece from the Eurozone. [1]