[2] After leaving school he and his brother Mariano, while expecting to emigrate to Canada, put their energy into the family businesses.

For many years Marraco was manager of the Azucarera Agrícola del Pilar, part of the sugar beet industry at a period of growth in Aragon.

[4] On 15 September 1918 in a speech at the Teatro Goya(es) in Barcelona Marraco said, "I am not afraid of the independence of Catalonia, because in it I also see that of Aragon and the other regions that would join in a future bond to form the great Iberia, respecting each other's characters and achieving a real enlargement.

[3] Marraco was elected deputy for Zaragoza as a Radical Republican on 26 June 1931, holding office until 9 October 1933.

In 1934 he managed to get the Ebro River Hydrographic Confederation restored, covering a wider area than traditional Aragon, but it was dissolved during a crisis in 1935.

[3] He believed in Georgism as popularized in Spain by the engineer Antonio Albendin, the promoter of the Spanish League for a Single Tax.

[11] Both Lara and Marraco complied with requests from Lerroux to treat the businessman Horacio Echevarrieta favorably in his dealings with the state.

His government had to deal with growing workers unrest in the large cities and on among land-workers, and a challenge to central authority in the Generalitat de Catalunya.