Well, the IMF and ECB's time scale for predicted recovery in Greece has been 18 months ever since austerity was implemented in 2009.
So that's roughly four complete and total fuck ups in a row.
How much more time do you need?
There's always a chance, of course, that austerity is utterly destructive towards the Greek economy but very good for German financiers (with the ear of the ECB) who would like to pick up a port or state electric company on the cheap and who like the flood of cheap labor the austerity crisis has instigated.
Measured on what timescale?