The illusion of the closed garden

Switzerland, CNBC reports, is putting to a popular vote the question of whether to cap its population at ten million — a threshold it is already approaching. The instinct behind the proposal is perfectly intelligible: pressure on housing, on transport, on the texture of daily life. I do not dismiss those pressures as imaginary. But the economic reasoning embedded in the proposal is, I am afraid, precisely the kind of reasoning that sounds like common sense at the kitchen table and becomes a trap at the national level.

The first error is to treat people primarily as a cost rather than as a source of demand. Every new resident is also a consumer of bread, a renter of apartments, a customer of the very small businesses whose owners may be voting yes on Tuesday. When you restrict the inflow of people, you do not merely ease pressure on one side of a market — you suppress the demand that gives the other side its vitality. The aggregate is not improved by making it smaller; it is merely made quieter, and quietness is not the same as comfort.

The second, and more consequential, error is what I would call the politics of the single variable. A housing shortage is a signal that Switzerland is not building enough houses — a solvable problem of public planning and investment — not an argument that Switzerland has too many people. To treat a failure of supply-side policy as evidence of excess population is to misread the diagnosis and guarantee that the cure does nothing for the disease. Build the houses; invest in the infrastructure; reform the planning laws. These are hard but tractable tasks. Constitutionally limiting the headcount is a blunt instrument applied to the wrong problem.

Then there is the international dimension, which CNBC flags directly: a yes vote would put Switzerland's bilateral free-movement agreement with the EU under severe pressure. Switzerland is a small, extraordinarily open economy whose prosperity is inseparable from the trade, capital, and talent flows that its European relationships sustain. To imperil that architecture for the sake of a population ceiling is to court an economic consequence far larger than the housing pressures that motivated the vote. I spent the better part of 1944 at Bretton Woods arguing that international economic arrangements are a public good requiring deliberate design and patient maintenance. They are also, I would add, remarkably easy to damage and remarkably difficult to rebuild.

I hold no brief against democratic self-determination — quite the contrary. But democracy is best served when voters are given an honest account of the full cost of a choice, not merely its most visible benefit. The visible benefit here is a number on a census document staying below ten million. The invisible costs — suppressed demand, labour shortages in healthcare and construction, a strained relationship with Switzerland's largest trading partner — will arrive quietly, spread across years, and be difficult to attribute to a single referendum. That is precisely when bad economic decisions are hardest to reverse. The long run, as I have had occasion to remark, has a way of arriving on its own schedule, indifferent to whether we are ready for it.