What was one of the reasons for the growth of indicators of industrial development in the USSR

What was one of the reasons for the growth of indicators of industrial development in the USSR in the second half of the 1960s?

The implementation of the Kosygin reform led to the fact that the eighth five-year plan of 1966-1970 was called “golden” because of the high growth rate of 7% annually. The reasons for the economic growth were as follows:

The rate on material incentives.
Purchase of modern equipment and construction of giant factories, for example, VAZ.
Development of the fuel and energy complex of Western Siberia.
There was also a rapid growth of the population and its influx into the cities, rural residents en masse went to work at construction sites, at factories.
Decentralization of the economy and transfer of part of the profits to enterprises.