For a left government leaving the euro would be a major strategic error. The new currency would be devalued as that is, after all, the desired objective. But that would immediately open up a space, which the financial markets would immediately use to begin a speculative offensive. It would trigger a cycle of devaluation, inflation and austerity. On top of that, the debt, which until that point had been denominated in euros or in dollars would suddenly increase as a result of this devaluation. Every left government which decided to take measures in favour of the working class would certainly be put under enormous pressure by international capitalism. But from a tactical point of view it would be better in this test of strength to use membership in the euro zone as a source of conflict.