A symptom of a pre-revolutionary society is where a large swath of population has abandoned the quest for prosperity and good living and is now more interested in the destruction of big wealth than the creation of 'little wealth' as a bottom-up concept. This happens when many people stop believing they have any chance at all of bettering their situation and while they observe this, they also watch the rich getting richer. What happens next is a confluence of bitterness-thinking and a groundswell of sentiment that wants to burn it all down rather than continue with this farce.
America is not quite at French revolution flashpoint - not yet. Because many millions of people are in fact better off than they were 2-3 years ago, and are reaping benefits of starting new businesses and working their asses off. There are sufficient numbers of the latter group to cool the reactors of the angry bitter disillusioned people, and perhaps we'll manage to get through the next 2 years without a full scale revolution. Biden's infrastructure plan will pass, in some form, and will create millions of good jobs.
The existence of billionaires is not toxic for most humans. It's only toxic when we believe we have no possibility of getting up from the shithouse conditions created by the neoliberals' global trade landscape and the Walmart economy that was left standing after the exit of our manufacturing industry.