Cordon‑sanitary backfire risk

A blanket rule forbidding any parliamentary outcome that depends on a far‑right party can create coordination burdens and perverse incentives that make accidental cooperation more likely and governance more brittle. When arithmetic forces informal vote‑tracking and repeat votes, principled signallers (small faction MPs, parliamentary chairs) can inadvertently enable the very results they intended to block. — This reframes debates about excluding extremist parties from cooperation as a practical institutional design question with democratic costs, not just a moral posture.