Hihi!
The answer would be that Joseph Stalin did not like the plan due to the amount of aid going to Germany! I believe this is because not too long before World War II happened in Europe, the enemies Nazi Germany and the Soviet Union surprised everyone by signing the German-Soviet Nonaggression Pact, which the two countries agreed to absolutely no military action against each other for the next decade!
I hope I helped!
-Jailbaitasmr
