The first part is unquestionably true, revolution is the exertion of the authority of one class upon the rest. The latter parts are entirely wrong, or misguided.

Socialist countries put the working classes in charge. The goals are not lost, it's that the goal of a working class state is the same as the general class goal of the working classes, the collectivization of production and distribution. This goal is not lost whatsoever, but it does require protecting against opportunists, as well as the former ruling classes, as they still exist and cannot disappear overnight.

The Nordics on the other hand are imperialist countries. They bribe their working classes with the spoils of exploiting the global south. This kind of class collaboration is why social democracy is often called social fascism by critics, as it's collaboration and agreement to perpetuate imperialism in order to have cushy safety nets. Without imperialism, the Nordics would need to turn socialist in order to retain their safety nets.