When immigrants refuse to integrate into the host society's legal, linguistic, and commercial fabric, they create jurisdictional ambiguity. Ambiguity is where transaction costs breed. But that is only part 1 of the problem cascade. Consider the banlieues ringing Paris, where Sharia-adjacent informal courts settle disputes that French civil law theoretically governs. Two competing legal systems occupying the same geography produce institutional decay. Contracts become unenforceable across community lines. Capital avoids the uncertainty. Citizens pay that cost in stagnant property values and higher insurance premiums. But wait there is more. Language is infrastructure. A Turkish enclave in Berlin where 40% of residents speak no functional German represents a communication barrier that price signals cannot cross efficiently. Entrepreneurs cannot hire freely across that barrier without absorbing translation overhead. Labor markets fragment. Wages inside the enclave compress because the worker pool cannot compete in the broader market. Then, the welfare state makes it dramatically worse. State subsidies remove the market pressure that historically forced assimilation. Ellis Island immigrants learned English because the market paid them to. Today the German government pays families in Neukölln to remain monolingual, then wonders why parallel societies calcify across two and three generations. Non-assimilation creates a property rights problem across cultural barriers. Voluntary immigration into a free society demands adoption of its legal foundations. Anything less transfers real costs onto existing citizens without their consent, and that is simply redistribution without even a passport. Fast forward 20 years and you end up with this: