In 1928 the government of Gustav Schädler was the subject of an embezzlement scandal involving the National Bank of Liechtenstein.

[5] The Christian-Social People's Party tried to charge Büchel for the scandal, in which he immediately demanded an investigation and was acquitted of all allegations.

[1][6] As a result of the scandal, Johann II forced Schädler's government to resign and early elections were called.

In the government, Büchel represented rural concerns and advocated for the building of a 23 km long inland canal to increase the percentage of arable land within the country and to create job opportunities within the country, which was approved in 1930, started construction in 1931 and then completed in 1943.

[1][8][9] Büchel was a staunch opponent of National-socialism and he played a role in thwarting the German National Movement in Liechtenstein (VDBL) when they attempted a coup in 1939.