Complex sentence: When Alexei Kosygin, the Chairman of the Council of Ministers, initiated the 1965 economic reform the Ministry of Finance sabotaged the reform by not fully implementing it which, along with many other reasons, helped the reform to fail.
Split into simpler sentences: When Alexei Kosygin, the Chairman of the Council of Ministers, initiated the 1965 economic reform the Ministry of Finance sabotaged the reform by not fully implementing it. This, along with many other reasons, caused the reform to fail.