The Replacement Ledger: Who Pays for Europe's Migration Machine

...  Spain took 63,970 irregular arrivals in 2024 and added 474,454 residents in the same year. The Union’s foreign-born population grew by 1.9 million in 2025 against 239,000 irregular crossings in 2024. The boats are the loud part. Most European immigration arrives by air, on visas, through family reunion and labour schemes, and generates almost no television footage at all...

Milton Friedman, who spent a career arguing that institutions shape behaviour more reliably than intentions do, gave the resulting constraint its most quoted form.

... Europe built contributory welfare systems for a growing population and then attached them to an immigration regime designed for entirely different purposes, and the two have been renegotiating the terms ever since.

The decisions that built the present [see table in original article]...

Postwar reconstruction ran on manpower. West Germany’s economy expanded faster than its workforce, and from 1955 onwards Bonn signed a series of bilateral agreements to import labour: Italy first, then Greece and Spain in 1960, Turkey in 1961, Morocco in 1963, Portugal in 1964, Tunisia in 1965, Yugoslavia in 1968. France ran its own recruitment... The Netherlands brought in Moroccans and Turks. Belgium signed agreements in 1964. Sweden recruited Finns, Greeks and Yugoslavs...

The operative word in German policy was Rotation. Workers would come, earn, and rotate home, replaced by fresh recruits from the same villages. The operative word in German policy was Rotation. Workers would come, earn, and rotate home, replaced by fresh recruits from the same villages. By 1973 the Federal Republic hosted roughly four million foreigners, of whom some 2.6 million were in work. Then the first oil shock hit, unemployment rose, and on 23 November 1973 Bonn stopped recruiting. France followed the following year.

Rotation ended that day, and almost nobody noticed for a decade. Workers already inside Germany faced a choice between leaving permanently and bringing their families, and they overwhelmingly chose the second...

What matters for the present is the assumption buried underneath. Every European welfare state built in the twentieth century — Bismarck’s pension insurance of 1889, Beveridge’s postwar settlement in Britain, the continental systems that followed — assumed a population that replaced itself. Pay-as-you-go pensions depend on the ratio between contributors and beneficiaries...

Then fertility fell, everywhere, and kept falling. By the 1980s European rates were below replacement...

The result is the position Europe occupies today. It has a welfare architecture built for a growing population, a labour market that has absorbed tens of millions of people born elsewhere, and an immigration regime assembled piece by piece in response to emergencies rather than designed...

Sixty years of decisions made one emergency at a time produced a system nobody chose and few understand, and it is now large enough to shape the continent’s future more than any government that inherits it...