This is not criticizing socialism. However, the narrator did fight for socialism, and he succeeded in creating a socialist system. The main part of the song is the idea that without something to fight for, he is useless. It could be somewhat of a metaphor for communism in Russia, how it began as a noble idea, and after it was put into place it lost its purpose and became something for tyranny to hide behind.
This is not criticizing socialism. However, the narrator did fight for socialism, and he succeeded in creating a socialist system. The main part of the song is the idea that without something to fight for, he is useless. It could be somewhat of a metaphor for communism in Russia, how it began as a noble idea, and after it was put into place it lost its purpose and became something for tyranny to hide behind.