Bilger, elected at thirty, was the group's deputy chair from 2009 and its chair from 2014 to February 2018 (German Wikipedia gives January 2018). He left the post shortly before joining the government as Parliamentary State Secretary.
Groups of this kind give younger members a collective voice inside a large parliamentary group. They tend to focus on questions with a long time horizon, such as public debt, pensions and generational fairness, and can matter in close votes. That became visible in autumn 2025. Eighteen Junge Gruppe members opposed parts of the coalition's pensions package, at a time when the coalition's majority was only a dozen seats. Bilger, by then the group's First Parliamentary Secretary responsible for securing majorities, said on 15 October 2025:
Die Junge Gruppe hat schon einen Punkt.
“The Junge Gruppe does have a point.” (translation)
Steffen Bilger, 15 October 2025 — reported by heidelberg24
He added that he was not happy with how the younger MPs had phrased their opposition. The package passed on 5 December 2025 with 318 votes, two more than an absolute majority of members. See First Parliamentary Secretary.