Slim chances of anything like that happening. Besides, there are such people in every generation. They just change what they target (after all it's about the control and the profit, not about particular victims. E.g. now they can afford to play it non-racist, since why should they care much about suppressing blacks in particular, when they can now fuck the whole population?).
If we are persistent and unforgetting, this might become a reality one day. We should find "such people" in every generation and make sure they don't have a chance to do such mistakes to pay for them later, but on the question of payment we should be adamant.
The trick here is to not be conflict-averse and not be a slave of own wallet but to care about justice even after the years.
Modern justice is all like this:
We know this guy perpetrated, but it was some time ago and he's well connected and it's awkward for us so we're going to "hate his sin" but without any effect on his well-being. But you, dear listeners, please behave.
Ah, on unrelated note, we jailed a poor person for 10 years for a fraction of damage because it was politically convenient.
Is this maybe a cultural thing? Is vengeance a commonplace solution to problems in your culture?
Indeed, recent years by Putin, Erdogan and Obama show that you can pass a lot of things as a law and everybody has to comply. To any kind of insane dung!
Unfortunately, not. Because in my culture, the commonplace handling of problems is not solving them but just piling up and then dying when they topple over.