It would be a gamble.

No new austerity measures will be passed. That's all that needs to happen.

Then the EU decides what to do. Any move that undercuts the Greek banking system or any other such measures will be interpreted everywhere as a forceful push outside of the euro (which then, yes, will be followed by a Greek decision, as to whether they should capitulate, or move on). But no one enters into the gambit without anticipating these events.