Help me understand something. Piketty seems like he is in favor of repaying this debt by "inflation, a special tax on private wealth, and debt relief." But, h

Help me understand something. Piketty seems like he is in favor of repaying this debt by "inflation, a special tax on private wealth, and debt relief." But, he is against Greece leaving the Eurozone. So, how can they inflate their currency? Instead of inflation, which is impossible if Greece shares the Euro currency, is he suggesting that some percentage of Greece's debts just get knocked off? That would achieve the same result, I think.