"The manic attempt to keep Greece in the eurozone under conditions that are not sustainable is turning the country into a sort of Kosovo, an EU protectorate that produces little but surplus labour," said Varoufakis.
EU economics chief Olli Rehn said Greek austerity was "difficult but necessary", and should bear fruit in 2014.
There are at last signs the eurozone is bottoming out after the longest recession since World War II, but the European Central Bank yesterday poured cold water on hopes for full recovery.
It predicted the zone's economy would contract by 0.6 per cent this year, and eke out growth of just 0.9 per cent in 2014, and 1.5 per cent in 2015, too little to curb unemployment. The jobless rate would ratchet up to 12.4 per cent next year.