the tragedy of soviet union was mass centralisation of power into the hands of "apparatchiks" or people who spent their lives working of political party. when the ussr began to collapse in the 50s, it was slow and steady march that led to the scramble in the 80s-90s to seize as much decayed industry as possible. this is the beginning of what you call the "oligarchs". ultimately those oligarchs are simply self-serving people that prioritise their wealth/wellbeing over that of other people. like lukashenko clearly has no interest in history and certainly no interest in creating a lasting legacy. when he decides to retire, belarus will simply vanish and with it all their history.
Poland