Give it five years.

I agree. Although, looking at these assumptions, subjectively I think that all four of them are in question, and as time passes, their eventual long-term failure seems increasingly likely. Even if one of these four pillars persists, I would expect an overall worsening by default. If democratic rule persists in places, the most powerful would occupy places where it does not exist, or create fully private states, still wielding enormous power over democratic states through wealth and military might. If violent rebellion is technically possible, a middle ground will be carefully calculated where the lower classes are kept on life support with the minimum amount of resources required to dissuade unrest. If the trillionaires of tomorrow suddenly start caring about other people, they could employ second-order measures to effectively reduce the population, thereby safeguarding themselves - massively constraining or removing the supply of food, water, medicine, any vital technology that would be only available to them. I don't see how an economic crisis would prevent automated enforcement, it may only delay it a bit.

Hope is kind of in short supply nowadays. Even if your hypothesis of absolute-automation doesn't happen within our lifetimes, things seem to be guaranteed to get worse for people like us. If it does happen... we'll likely never reap any real rewards from it, barring a complete restructuring of our whole society to an extent that has never happened and likely would never be allowed to happen.