You're right, nobody is saying "screw it, we just won't pay". Hell, I'd be ecstatic if changes were instituted that reduced bureaucracy, made the public sector simpler and more transparent for citizens, and fostered entrepreneurship, rather than the current climate of uncertainty.

Unfortunately, right now, everyone in Greece is paralyzed, because they don't know if, a few months from now, a new tax or law will be instituted that will kill their business, or mean they will no longer be able to feed their family (for the ones that still can). I think this prolonged uncertainty is the biggest problem right now.