The option to make up missed payments into pillar 3a is one such case. It goes back to a single parliamentary initiative.
Responsible for it is Council of States member Erich Ettlin of the Centre party. His motion from 2019 called for employed people to be able to close contribution gaps in pillar 3a retroactively, something that had not been possible for decades. The Federal Council eventually implemented the mandate through a change to an ordinance, which came into force on 1 January 2025. Specifically, gaps arising from 2025 onwards can since be filled up to ten years retroactively, and the back-payment is tax-deductible just like the ordinary contribution. The road there was tough, as the Federal Council had originally rejected the motion. Persistence paid off.
It was neither Damian Müller nor Pierre-Yves Maillard nor Werner Salzmann who showed this long breath, but Erich Ettlin. A good example of how patience pays off in pension policy, much like saving itself.