As President of the Economic Society, he joined in 1903 for the establishment of a Graduate School of Berlin.

Because of the need to occupy Kaempf's Reichstag mandate constituency anew, the Independent Social Democratic Party of Germany (USPD) could nominate the left trade unionists and revolutionary Richard Müller for the by-election; the government had to exempt these from military service.

Müller was released in September 1918 from the army and came to Berlin, lost the election, but played a significant role in the organization of the insurrection of 9 November.

On 22 October 1899 Kaempf was awarded the honorary title of city elder of Berlin.

This was the decision for the inscription "To the German People" at the Reichstag building in Berlin.