Note: I believe that it was very commonly assumed in the USSR that the Russian SFSR was exploiting all the other union republics. As a consequence, most of the post-Soviet leaders expected their new countries to immediately become wealthier. But, the reverse was true: in fact the RSFSR was subsidising the others thanks to its energy reserves.
…like everyone else, I believed that Ukraine is so rich that it provided for the entire [Soviet] Union. It turned out that it is, in fact, rich. However, was it really a provider?
Leonid Kuchma, then PM of Ukraine and later President, Holos Ukrayiny, Kiev, 4 November 1993