Half way through the book the wall collapses, and having no job, he shoots David Bowie in Berlin after discovering he has underage groupies. The rest of the book is him being put on trial with all the teenagers and real life musicians he beat up testifying against him.
The USSR fell because of a neoliberal coup, not because the youth wanted to listen to rock music. The dissolution was voted against in the referendum, there were riots on the streets and the supreme soviet was fucking bombed.