[1] Kaiser was a founding member of the Progressive Citizens' Party in 1918.

[2] In addition, he was a deputy judge at the Liechtenstein supreme court from 1922 to 1927.

[1] Kaiser married Rosa Goop (27 October 1872 – 6 July 1907) on 7 January 1895 and they had six children together.

He then went on to marry Angelina Hasler (3 September 1878 – 2 June 1922) on 24 May 1909 and they had another six children together.

[1] His daughter married Eduard Oehri, who also served in the Landtag.