I was curious about what “Bolshevism” specifically meant in that context. Maybe it is the centrally planned part of Soviet communism as opposed to social democracy within an undirected private economy?

Bolshevism (from Bolshevik) is a revolutionary socialist current of Soviet Marxist–Leninist political thought and political regime associated with the formation of a rigidly centralized, cohesive and disciplined party of social revolution, focused on overthrowing the existing capitalist state system, seizing power and establishing the "dictatorship of the proletariat".

https://en.wikipedia.org/wiki/Bolshevism