The US announced the withdrawal of thousands of troops from Germany, prompting Guardian editorial calls for a pan-European defence strategy.

Well, they announced the withdrawal of thousands of troops from Germany, which I suppose makes sense if you don’t think about it too long, which is probably the idea. It is a curious thing to watch the architects of international security pack up their tents and head for the door, while the people who live in the house are busy arguing about who is supposed to pay for the roof. The United States is pulling back, and the European Union is suddenly discovering that it has a defense strategy, or at least a very loud desire for one. It is all very dramatic, in the way that a man is dramatic when he realizes he has left the stove on, only to find out the house is already burning.

The Guardian has called for a pan-European defense strategy, which is a polite way of saying that Europe needs to grow up and start carrying its own weight. Now, I have nothing against Europe. I have spent a good deal of time there, and I find the people charming, the food excellent, and the history fascinating. But there is a difference between enjoying a vacation and running a household. For decades, the arrangement was simple enough: the Americans provided the muscle, and the Europeans provided the money and the moral authority. It was a partnership, much like a marriage where one spouse handles the heavy lifting and the other handles the social calendar. It worked well enough, until the spouse doing the lifting decided he was tired of the arrangement and wanted to see if the other could manage the groceries without him.

Donald Trump, in his second term, has decided that the bill is coming due. Friedrich Merz and the rest of the German leadership are looking rather uncomfortable, like a man who has been wearing someone else’s coat for so long he has forgotten how to button his own. The stakes, as the experts say, are high. The European security architecture is at risk. NATO’s posture is shifting. Strategic autonomy is the buzzword of the hour. But let us translate that into something a farmer in Oklahoma or a shopkeeper in Berlin might understand. It means that for the first time in a long time, the neighbors are being asked to buy their own locks for the front door.

The contested point, of course, is whether the EU countries can actually mount an effective defense without the American umbrella. The answer, I suspect, is that they can, but it will cost them more than they are used to paying, and it will take longer than they are used to waiting. The scale and timing of the withdrawal are debated in the halls of power, but the reality is simpler. You cannot have it both ways. You cannot have the security of a superpower’s military presence and the independence of a sovereign nation’s budget. One of those things has to give. And right now, the checkbook is talking louder than the treaty.

There is a bipartisan mirror here that is worth looking into. On one side, you have the American politicians who promise to bring the troops home and save the taxpayer money, while simultaneously worrying that the world will fall into chaos without their presence. On the other side, you have the European leaders who complain about American dominance while relying on American protection. Both sides are right, and both sides are wrong. The Americans are right that Europe has not paid its fair share for a long time. The Europeans are right that a sudden vacuum of power is dangerous. But the absurdity is that they are both acting as if the other side is the problem, when the problem is the arrangement itself. It was always a temporary fix, dressed up as a permanent solution.

The common-sense translation is this: if you want to be independent, you have to be willing to pay the price of independence. If you want to be protected, you have to be willing to accept the conditions of protection. You cannot have the benefits of both without the costs of both. The folks back home in the United States are tired of paying for a security umbrella that keeps the rain off their neighbors’ heads while their own roofs leak. The folks in Europe are tired of being told what to do by a distant power that does not understand their local politics. It is a natural friction, like two gears that have been grinding against each other for too long.

The shrug is not indifference. It is the recognition that this is how politics works. The powerful make decisions, and the rest of us adjust. The difference is that this time, the adjustment is going to be expensive and uncomfortable. The European Union will have to coordinate its defense, which means twenty-seven countries will have to agree on what they are defending and why. That is a tall order, even for a continent that has managed to agree on the size of a banana. The United States will have to decide if it wants to be a global policeman or a regional power. That is a tall order, too, for a country that has always believed it has a duty to the world.

In the end, it is just a matter of arithmetic. The money has to come from somewhere. The troops have to go somewhere. The security has to be provided by someone. The question is not whether the system will change, but how quickly it will change, and who will be left holding the bag when the dust settles. I suspect it will be the usual suspects: the politicians who made the promises, and the citizens who have to live with the consequences. It is a familiar story, told in a new chapter. And if there is any comfort to be found, it is that the folks back home have always known that the bill would come due eventually. They just didn’t think it would be this soon.