[WS:] This is not to defend Sachs, but the big jump argument was very popular in Eastern Europe at that time. Even more peculiar is the fact that this argument is borrowed (without proper credits) from Oskar Lange, who staunchly defended superiority of socialism over capitalism. Lange argued that transition from capitalism to socialism must be made at once to avoid serious disruptions of the production during the transition.
Autres temps, autres moeurs. But it does support Corey Robin's argument that reactionaries sponge off their tactic from revolutionaries.
Wojtek