As someone who grew up in the Soviet Union (during a later period), I found it really interesting to look at this photographs.
One thing worth pointing out: Moscow was very different from the rest of the country. It had better housing and infrastructure, the shops were stocked far better than elsewhere in the country, it had more grandiose architecture and richer cultural life and so on.
In many is ways it was the country's showcase city.
So, the same as any big urban center anywhere has better infrastructure and cultural life compared to villages and rural areas? Or was it particularly pronounced in the USSR?
Moscow plus Leningrad plus Vladivostok. The rest fought for the crumbs.
Nothing has changed in that regard. Moscow still receives much more monetary attention than any other city in Russia.