Soon after, Siqueiros painted his famous mural "Burial of a Worker" (1923) in the stairwell of the Colegio Chico. The fresco features a group of pre-Conquest style workers in a funeral procession who are carrying a giant coffin, decorated with a hammer and sickle. The mural was never finished and was vandalized by students at the school who did not agree with the overtly political subject matter in the painting. Eventually, the entire painting was whitewashed by the new Minister of Education who succeeded Vasconcelos. But as the union became ever more critical of the revolutionary government, which had not instituted the promised reforms, its members faced new threats to cut funding for their art and the paper. A feud within the union over whether to cease publishing "El Machete" or lose financial support for the mural projects left Siqueiros at the forefront, as Rivera left in protest of the decision to uphold politics over artistic opportunity. Despite being let go from his post under the Department of Education in 1925, Siqueiros remained deeply entrenched in labor activities, in the union as well as the Mexican Communist Party, until he was jailed and eventually exiled in the early 1930s.