With all the achievements in science, industry and social standards, the Communists really had one unpleasant feature - the solution of national minorities problems at the expense of the state-forming nation. So, the West part of the USSR received much more subsidies, had priority in modernization of manufactures and infrustructure. The standard of living in the Russian Republic at the time was lower than in Ukraine or in Belarus.
More than 150 factories after WWII, most of them after 1948, where dismantlement from Serbia and moved to Bosnia, Croatia and Slovenia under pretext of Soviet invasion and help to poor areas.
All industries owned by Serbs and their property was after 1945 confiscated and money gained from such behavior is used to finance new factories in Slovenia and Croatia. Immediate after WWII biggest tax collection was in Serbia and all money has gone to federal budget, but it was used disproportional to finance most Slovenia and Croatia which prior WWII was not developed in Kingdom of Yugoslavia in same level compared to Serbia.
From more then 150 factories moved from Serbia there was 5 airplane producers, two electronics producers, one artillery gun producer etc.
Small Socialist Slovenia in then Yugoslavia achieved to have 5 car factories (Cimos-Tomos - Citroen, Renault - IMV, TAM, and Avtomontaza) compared with 6 time bigger Serbia that had only 4: FAP, Zastava, IDA - Opel and Ikarbus.
Slovenia had in Yugoslavia two big electronics factories: Iskra and Gorenje
compared to one Ei Nis in Serbia.
Slovenia had built with federal money nuclear power plant, most of construction was done under supervision of Institute for nuclear physics Vinca from Serbia.
Two big steel factories were built in Slovenia compared to one in Serbia.
Magnitude of moving federal money to Slovenia was colossal.
And it was not just about money. They had market, most people of Yugoslavia were Serbs and factories from Slovenia had unlimited access to all territories where Serbs lived.
And Yugoslavia Peoples Army had bought most of trucks from Slovenia manufacturer TAM compared to Serbia FAP ratio was approximately 1 FAP for every 5 TAM vehicles if not worse.
After 1991 when market for Slovenian products on Serbs territories collapsed Slovenia had many factories closed. There is no more TAM and many others are only partial or on much smaller scale compared prior to destruction of Yugoslavia. Entering EU did not helped them at all because Germans, French, Italians and others were not obliged as Serbs under communism to have only offer from Slovenian factories which they only can buy.
In recent years people in Slovenia had strikes because of worse economy and bad condition for living. But they never sad a THANKS to Serbs who liberated them(starting with WWI when Vojvoda Stepa Stepanovic entered and liberated Ljubljana from Hapsburg) and financed their living more then 60 years.
Similar was with Bosnia who gained many factories from Serbia most of them were moved under territories were Croats or Muslims lived.
For example Artillery factories in Novi Travnik(today Bosnia and Herzegovina - federation part) was built by Serb workers from Zastava Kragujevac and all machinery used in what is today Zastava Arms to produce weapons of caliber greater then 30mm was moved from Serbia to that new factories in Bosnia and Herzegovina. More than 1000 workers from Serbia came to built that factory and among them was about 400 Zastava workers who then lived and trained domestic workers to take their seat.
And we are not petty people and in end we where glad to help but to accuse us of race or any other discrimination is criminal.
Most money and machines retrieved from Germany as a war reparations for WWII ended in Slovenia and Croatia even if it was for Serbs victims and Serbians factories reparation were mostly given.
It was all done under pretense that Serbia as most richest part of post WWII Yugoslavia must help underdeveloped regions and in some part further explained to protect Yugoslavia from Soviet invasions.
Interesting when communist talked about possible invasion of NATO from Italy and Austria not a single factories were moved out from Slovenia or Croatia. One of biggest steel mil in Slovenia is at border with Austria, and pretense for moving factories from Serbia is that they are to close to borders even if some of them were more than 200km from nearest border.
Many meeting with workers in Serbia were held in 1940's-50's under communist supervisions (communist commissaries) to explain need to move factories from Serbia to help our poor brothers and sisters in Bosnia, Croatia and Slovenia prior moving them in order to prevent possible rebellions.
They all in Yugoslavia had thanked Serbs and Serbia later in 1991 with killing and prosecutions of Serbs.
Similar in USSR was between now Russia and now Belorussia and Ukraine.
For example immediately after WWII then Russian Antonov factories where moved from Russia(Novosibirsk) to Socialist Ukraine capital Kiev. And now most people thinks Antonov is from Ukraine.
Most of industry in Ukraine has collapsed similar to Slovenia after dissolution of USSR and what was hoped to be saved is now on verge of bankrupt when Russia after 2014 is no more enabling Ukraine free access to domestic market.
Very similar stories, for Serbs and Russians and in same time nobody ever thank them for their good deeds, but both sides are called many times bad for something that was neither Russian or Serbian doings - Stalin was a Georgian, Khrushchev Ukrainian and Josip Broz was for most part Slovenian.
Italians where vary hateful to Serbs for a long time after WWII until mid 1970's because they lost Istria to Slovenia and Dalmatia to Croatia.
Lesson learned from history is that never one nation has fared good when outsiders ruled them.
In China you could find similar within Qing dynasties period(they have lost Taiwan, Hong-Kong and many more, and Han people was taking blame and had millions of casualties for their foreign leaderships mistakes). Qing were Manchurian-Jurchen minority that ruled majority Han people.
Han people is real name for nation than most on west call China people - typical western language nonsense that is used to describe them and most common mistake today in most countries including mine. I try to educate people us much I can but for some it looks it is beyond their brain possibilities to make a difference in names of nations or shapes of people, not to talk about history.