The undelying point Schauble is subtly trying to make is that you cannot switch back to an alternative currency without help from outsiders. Iraq needed US help

The undelying point Schauble is subtly trying to make is that you cannot switch back to an alternative currency without help from outsiders. Iraq needed US help, as was recently noted in the Guardian: "In occupied Iraq, the introduction of new paper money took almost a year, 20 or so Boeing 747s, the mobilisation of the US military’s might, three printing firms and hundreds of trucks. In the absence of such support, Grexit would be the equivalent of announcing a large devaluation more than 18 months in advance: a recipe for liquidating all Greek capital stock and transferring it abroad by any means available." You think France could go back to the Franc without outside help? I highly doubt it. The point Schauble is trying to make is that if France wants to go the way of Greece, it would only involve lots and lots of pain. Abide by their rules, or else.