Because the allies did 'exact' contributions in kind from most of the Confederation states, as well as troops to continue to war. Bavaria was excepted because she defected early in the campaign. Saxony, Wurttemberg, Baden, and Hesse-Darmstadt did not, and the Wurttembergers were noted for their loyalty after Leipzig. They only left the Grande Armee because they were called home by their king as their country was being overrun by the allies.

It should also be noted that the overriding consideration of the major states of the Confederation was to maintain their independence as a state. Both Austria and Prussia had 'competed' for years for mastery in Germany and the organization of the Confederation of the Rhine had forestalled those plans. Prussia's conduct during and after 1813 in grabbing as much land in western Germany was one of the reasons for their participation in the war (the other being revenge for the humiliation of 1806). Prussia's treatment of Saxony was a continuation of their 'problems' with that country which dated as far back at least to the Seven Years' War. Prussian hegemony in Germany was not an advantage for Germany.