To guarantee this, it abolishes social structure, since there cannot be transformation, unless there is a structure to be tranformed. Under fire, the neo-Classicals turned in other directions. One is the abandonment of growth alltogether in the favor of new, expectations-wise statics. This tactic makes growth exogenous, with parameters given time subscripts. Growth can be put outside the model, with expectations inside, or vice versa.
All hell breaks loose if both are brought inside at the same time.
The neo-Classicals did develop powerful mathematical muscles. What this all demonstrates is that there is no way to understand the growth of an economic system starting out from a foundation of ontological individualism and atomistic competition. Another path away from the Cambridge critique led into the world of Wlrasian general equilbrium. Tremendous problems here, and almost impossible to introduce growth and technical change, as Walras well understood.