Born in Belfaux on 28 February 1944, Lauper's family was originally from Giffers.[2] He earned a degree in law and practice as a lawyer.[3] As a member of the PDC, he served on the communal council of Belfaux from 1966 to 1976, where he served as trustee in 1970.[4] On 14 November 1976, he was elected Prefect of Sarine District, succeeding Laurent Butty [fr]. Supported by the PDC and the remnants of the Party of Farmers, Traders and Independents, he received 59% of the vote against his opponent, Socialist Party member Félicien Morel [fr]'s 41%.[5] He was re-elected in 1981 and 1986 without opposition.[6][7] In 1991, he was re-elected again with 80% of the vote against the Green Party's Gérard Bourgarel [fr].[8] He did not seek re-election in 1996 and was succeeded by Nicolas Deiss.[9]
In 1986, Lauper ran in the Council of State of Fribourg [fr] election, but withdrew after the first round following a poor result.[10] This was due to the fact that he was simultaneously running in the prefectural election, for which the results were incompatible.[11] In 1995, he was elected to the National Council. His campaign was highly publicized due to the creation of its own website during a time in which only approximately one thousand internet users lived in the Canton of Fribourg.[12][13][14] He did not run for re-election in 2003.[15]
Lauper died on 17 June 2024, at the age of 80.[16]