Thinking about that notorious Christine Lagarde interview a couple of days back, it occurs to me that it's the first time any big timer has put the issue of tax collection front and central in the Greek austerity debate. Up till now it's all been a combination of supposed unwillingness to work and excessive public spending - things that could be 'cured' by austerity, if you'll forgive the euphemism.
Ordinary Greek taxpayers pay up; at least these days, since taxes have been fed into things like utility prices, they don't have any choice. I also bet that a Syriza government wouldn't have a political problem at all in trying to force the evading classes into paying up; not just because they're left wing but because they're outside the old cozy duopoly.
So despite the insulting nature of Lagarde's demarche, you also have the first hint of common ground between Syriza and what may be its future creditor alliance.
If so , it's about time: it's not as if they're an actual extreme left party. They want to stay in NATO and the EU, which puts them somewhat to the right of Labour in 1983. As I understand it, what they basically want to do is to change the question from 'what are the Greeks prepared to suffer to stay in the Euro' to 'what lengths are the rest of the EU and the relevant organisations prepared to go to keep them there.' Optimistic I know, but maybe Lagarde's hinting that a deal might be available on these terms. Something like how much extra income can you collect in return for more debt forgiveness/Eurobonds/whatever it takes.