Seeing where we stand now this was quite a visionary step. Switzerland paid for it with slower growth etc. but is now one of the countries with the healthiest Budget (a feat especially considering Switzerland does not have any natural resources) and one of the few (besides Singapore and Norway I think) that is not in danger of losing its Triple-A ratings.
[1] http://en.wikipedia.org/wiki/Balanced_budget_amendment#Switz...
Since US GDP is currently far below potential GDP that would seem to allow for a substantial fiscal stimulus right now but force the government to save when the economy is stronger again.
Many people saw the Swiss Franc as a safe haven currency and massively bought them up, driving up the exchange rate. This caused Switzerland's exports to become uncompetitive which is also slowing what is a very export driven economy.
Oddly enough prices haven't really come down domestically either, but neither has unemployment risen that much (despite large layoffs in the financial services sector, particularly in their biggest banks, UBS and Credit Suisse).
Sweden and Estonia
Still, you are right that they may not be reducing debt, but at least they are keeping it stable.
Anyway, I think Italy does have a great industrial base, so they have something to work with if they can get some reforms done. Not so in Greece.
But maybe I'm just whistling in the dark here. If interest rates spike and the ECB stops buying debt all talk of longer term sustainability will be moot.
The amount of government debt the non bank private sector wants to hold now is maybe half the existing stock. Higher real interest rates might increase that level somewhat by encouraging saving, as might mandated savings. The alternatives are inflation or default, or trying to float a giant government hedge fund to take on the leverage, the EFSF plan.
I don't think the the EFSF will play much of a role in that. Ultimately the ECB will have to keep Italy's (and later Frances) bond yields at a sustainable level. They will have to do what the Fed and the Bank of England have been busy doing all along: monetize the debt. Trouble is, they're not legally permitted to do that, but I think the Germans are pragmatic enough to let it happen. The question is when.
edit: The surplus/deficit is the first derivative of the debt. Whether a country runs a surplus or a deficit changes from year to year.