Never happen. Too much to sacrifice for politician. It’s easier to kick the can down the road.
Ironically, the Soviets were able to do it. They allowed the peaceful collapse of their own system.
I suppose they reached the point where even those at the top realized their system was completely fake and bankrupt. Here in the USA, we aren't even close to that. Our "elites" are convinced that more (neo) marxism is possible and desirable. Seems we have a long way to go.