Um... it might be useful if you reference that a little bit - you seem to be mixing in specifically Marxist philosophy with the various accretions to Marxism which have built up over the years. For example, the politburo, if I'm not grossly mistaken, is a specifically Russian term.
This mixing is entirely understandable, as almost nobody has ever professed or practiced pure Marxism.
In my understanding, Karl Marx's thesis was that the collapse of capitalism was inevitable, whether communists worked towards it or not.