Because socialist countries didn't have the same networks, hegemony or development at the start, the USSR didn't have infinite money, technology or resources to give anywhere
Because you hoard the brain in a box! (sorry, couldn't help myself)
I understand where you're coming from, but I highly recommend you read Masses, Elites and Rebels.
Because socialist countries didn't have the same networks, hegemony or development at the start, the USSR didn't have infinite money, technology or resources to give anywhere