It was Saudi Arabia that pumped record amounts of oil to deprive USSR of foreign exchange. USSR started to improve economy by exporting oil and importing items after 1975. The lack of oil revenue made USSR unable to import and hence economy collapsed. Gorbachev was a weak person and he cut down military instead of civilian economy which caused USSR to disintegrate.
Pakistan only made USSR lose Afghanistan, not entire USSR
How is Pakistan making up now? What is Pakistan giving Russia as compensation?