Many countries followed the German example in increasing the legal retirement age, reaching the German standard envisaged for 2030 (of 67 years of age) at an earlier stage (in Ireland: 2021; the Netherlands: 2021; and Denmark: 2022) or even exceeding it (in Ireland: with 68 years, starting in 2028).

The Swiss debt brake served as a model for the new German budget rule. The two tools share the long-term goal of rendering fiscal policy sustainable by stabilising nominal debt as well as the short-term goal of smoothing the economic cycle. Debt brakes thus act as an automatic stabiliser within...