German to English Tech/Engineering Engineering (general) metaphorical usage to apply to financial system

Quoting an article in the FAZ by Hau and Sinn:

Die von der EU-Kommission vorgeschlagene Bankenunion werde „in der Öffentlichkeit als ein Mittel dargestellt, eine **Brandmauer** zum Schutz der südeuropäischen Euroländer zu errichten, doch in Wahrheit eröffnet sie einen Brandkanal, der es den Flammen ermöglicht, sich in die Budgets der noch gesunden Euroländer hineinzufressen“.

I get the idea, which is explained below by the author, but I can't figure out if there is a term for this in English.

Explanation from author: A famous example is from the battle of Jutland, where the British "Invincible" got sunk, because they had, in order to speed up their shelling during the battle, left open the fire walls along the way from the ammunition dumps to the gun towers, so they could carry the ordinance faster, creating a "Brandkanal", through which the fire spread, within seconds, from the gun tower to the ammunition dump, once a German shell hit the gun tower. When the ammunition dump exploded, the ship sunk and took all but 6 of the more than 1000 people on board with it.

Thanks!