Why are there so many economic disasters in Europe? Actually, what’s striking at this point is how much the origin stories of European crises differ. Yes, the Greek government borrowed too much. But the Spanish government didn’t — Spain’s story is all about private lending and a housing bubble. And Finland’s story doesn’t involve debt at all. It is, instead, about weak demand for forest products, still a major national export, and the stumbles of Finnish manufacturing, in particular of its erstwhile national champion Nokia.

What all of these economies have in common, however, is that by joining the eurozone they put themselves into an economic straitjacket. Finland had a very severe economic crisis at the end of the 1980s — much worse, at the beginning, than what it’s going through now. But it was able to engineer a fairly quick recovery in large part by sharply devaluing its currency, making its exports more competitive. This time, unfortunately, it had no currency to devalue. And the same goes for Europe’s other trouble spots.

Does this mean that creating the euro was a mistake? Well, yes. But that’s not the same as saying that it should be eliminated now that it exists. The urgent thing now is to loosen that straitjacket. This would involve action on multiple fronts, from a unified system of bank guarantees to a willingness to offer debt relief for countries where debt is the problem. It would also involve creating a more favorable overall environment for countries trying to adjust to bad luck by renouncing excessive austerity and doing everything possible to raise Europe’s underlying inflation rate — currently below 1 percent — at least back up to the official target of 2 percent.

But there are many European officials and politicians who are opposed to anything and everything that might make the euro workable, who still believe that all would be well if everyone exhibited sufficient discipline. And that’s why there is even more at stake in Sunday’s Greek referendum than most observers realize.

One of the great risks if the Greek public votes yes — that is, votes to accept the demands of the creditors, and hence repudiates the Greek government’s position and probably brings the government down — is that it will empower and encourage the architects of European failure. The creditors will have demonstrated their strength, their ability to humiliate anyone who challenges demands for austerity without end. And they will continue to claim that imposing mass unemployment is the only responsible course of action.