The German Bundestag has a minimum of 598 members, yet over the years (and legislative periods), the Bundestag has grown in size. It currently has 736 members. I know about “kumulieren” and “panaschieren”, and I know about the Überhangmandate (overhang- and equalisation mandates). However, how hard can it be to just always use the 598 as a basis and prevent the Bundestag from bloating up? Why does it increase in size in every legislative period?