Also, how did the soviet system tream people who had been disabled due to WWII? If someone comes back without an arm or a leg were they given any sort of reeducation or a pension?
I certainly cannot claim to be an expert, but disability studies quarterly has an amazing article on this subject. It highlights the struggles of this "unknown population", and the manner in which the social programs or lack thereof affected people with disabilities. What complicates your question is the history of the USSR lasted more then half a century. The article below highlights the differences within the USSR in their treatment of that population from era to era. One of the most interesting era's the article discusses is the treatment of people with disabilities following world war two:
"In the post-war Soviet press and literature, those "invalids" who were able to "overcome" the traumas of war and "rise above" their physical disabilities were glorified as heroes, while the voices of others disabled by war were not represented."
Overall, the article goes in depth to address your question, and far more articulately then I could manage. Its key takeaway for me was while the USSR had many progressive and well meant programs, the disabled were often treated as an invisible and written off minority. Similar to the US in that respect I suppose.
During the Soviet era, many people with disabilities were institutionalized, permanently excluding them from society. At the same time, the authorities regarded self-organization among the disabled as borderline dissidence. In 1978, after a work accident left Valery Fefyolov confined to a wheelchair, he founded the Soviet Union’s first association championing the rights of people with disabilities. This resulted in years of harassment by the intelligence services, searches and a smear campaign in the press, until Fefyolov finally emigrated under K.G.B. pressure to West Germany.
And about WW2 veterans - a translation from Fefyolov's book link in Russian:
Those of us who have lived in Russia after the War have seen them in all public places (train stations, markets, town squares). Invalids who were injured during the recently-ended war, clothed in rags often with medals on their chest, now sentenced to a life of poverty and hunger.