Ok, let's talk two scenarios. First one: real world. We know how this one turns out.
Second one: Greece was never allowed into the Euro and off the Drachma. So what happens? Well, the lack of productivity in the Greek economy means the drachma stays and goes continually down in relation to the Euro, which we'll presume is the dominant currency-zone Greece wants to import from. The result is that Greece is forced to take responsibility for its own behavior much earlier-on, and without damaging impact on anyone else. At some point, the Greeks, in this scenario, simply cannot import much anything from Northern Europe, but their land, labor and capital become very cheap for external investors. Then, if the Greeks are at all smart, they get exploited for a little while to make foreign capital spend itself improving their productivity, until they can either become self-sufficient or balance their trade via cheap exports.
As Greek productivity improves, the drachma becomes more expensive, allowing the Greeks to then import more on the strength of their own economy rather than by borrowing from someone else.
It's simply a known fact in economics that separate macroeconomic policies and environments demand separate currencies, or else you get a financial crisis of some sort.
Second one: Greece was never allowed into the Euro and off the Drachma. So what happens? Well, the lack of productivity in the Greek economy means the drachma stays and goes continually down in relation to the Euro, which we'll presume is the dominant currency-zone Greece wants to import from. The result is that Greece is forced to take responsibility for its own behavior much earlier-on, and without damaging impact on anyone else. At some point, the Greeks, in this scenario, simply cannot import much anything from Northern Europe, but their land, labor and capital become very cheap for external investors. Then, if the Greeks are at all smart, they get exploited for a little while to make foreign capital spend itself improving their productivity, until they can either become self-sufficient or balance their trade via cheap exports.
As Greek productivity improves, the drachma becomes more expensive, allowing the Greeks to then import more on the strength of their own economy rather than by borrowing from someone else.
It's simply a known fact in economics that separate macroeconomic policies and environments demand separate currencies, or else you get a financial crisis of some sort.