triple lock

noun2

1. •
   (UK) A policy whereby the state pension is increased every year to match either price inflation, earnings growth, or a third fixed rate, whichever is highest.

   • He refused to rule out changes to the pensions triple lock and said a new windfall tax on energy profits was on the table. — 2022
2. •
   (Ireland) The requirement for approval by the Irish government, the Dáil (parliament), and the United Nations prior to any overseas military action by Irish defence forces.