I think EU don't need Greece that much really, all these talks about EURO collapsing are way too much exaggerated and unsound. If Greece does not want to live by the financial terms they themselves got into then it's their choice..
The thing is, if Greece leaves then Spain and Italy could be next, possibly France. I think the EU has been shady and borderline fraudulent throughout all this. They cooked the numbers to even get Greece into the EU in the first place. The Greek economy did not meet the requirements and they knew it in Brussels. It looks now like it was always about privatizing Greece's public sphere and looting their economy with predatory lending. The same BS the global 1% NWO assholes are trying to pull all over the world. At some point these a-hole bankers will probably demand that Greece hand over the Acropolis as a dept payment. Hopefully their whole system of power will collapse before it comes to that tho.
The creditors helped Greece to get into the situation, there's no doubt about that. But what's done is done.. Now, however, the circumstances are such that Greece are in no position to demand something, but they don't seem to realize it or pretend to not realize it and are pushing themselves into further troubles..