The neoliberal counter-reformation was planned long before then. The Chicago School and Hayek had already been planted and nurtured. The shift started in the late 70s with organised attacks on the concept of unionisation, socialised welfare, and government investment, combined with aggressive promotion of the private sector as a glorious, efficient, and generous engine of progress.

All of this was carefully seeded and very deliberately promoted and funded immediately after WWII. The most obvious example was the Mont Pelerin Society, which was given to Hayek to organise and wasn't just ideologically anti-Marxist, but aggressively anti-Keynesian.

The fall of the Soviet Union accelerated this process by finally removing much of the organised opposition to it. But it was already up and running long before Gorbachev became President.