As those troubles worsen with talk of Greece exiting the Eurozone, there seems to be worry about returning to the Drachma. I think that firewall will help Greece in the long term and allow it the freedom to recover by controlling its own monetary policy. It won't help with international flows of money - Greece will still struggle with imports but I guess it must have this problem now.
The Greek people need to regain control of their economy. They have been hit harder than most by the austerity measures demanded by negotiators and now they are demanding more.