RousseauX
Donor
If you need investment capital then 1970s is definitely the way to go. Not only did the Soviets benefit directly from oil revenues but the other PetroStates also had a huge inflow of cash. Many of those states decided to reinvest the capital and ended up financing a lot of East-Bloc loans. If the USSR had the political will to reform then the other petro-states had huge pool of potential capital for foreign investment.The Soviet Union had fairly bad diplomatic relations with many countries that is not the same things as being a pariah. It also could very well attract investment in a less tense diplomatic climate and had a massive internal market, which was to an extent under-exploited. In addition to a highly-educated population, world-class academic & scientific institutions and an existing indusrial base that could be modernized.
The population of the Muslim SSRs to the USSR are an entirely different kettle of Fish than China's ethnically Han population is to China.Soviet natural resources would yield an increasing benefits as Europe’s dependence of Russian oil & gas grows. As for manpower the U.S.S.R’s population was growing steadily. Particularly in the under-developed Central Asian SSR’s.