Matthew Brooker makes a compelling point: once governments introduce a mansion tax, the temptation to widen its net becomes irresistible. Britain's new levy might start narrow, but scope creep is practically inevitable. Tax brackets have a funny way of expanding over time—what begins as targeting the ultra-wealthy often ends up catching a much broader crowd. It's a pattern we've seen before, and there's little reason to think this will be different. Worth watching how this unfolds and whether it triggers capital flight.