My wag: when the rich can no longer profit from the poor. Or said the other way, when the poor can no longer buy stuff from the rich.
My biggest beef with these threads is that “the poor in America” is such a overly broad definition as to be completely meaningless. My reasoning is that “the poor in America” own things like iPods, Xboxes, cars, tvs, microwaves, and houses. And there are no shortages of rationalizations for why “the poor in America” NEED those things.
So as long as “the poor in America” are buying those things, people like the late Steve Jobs, Bills Gates, the Ford Family, the Walton family, and evil bankers, will continue to profit. And as long as the poor CAN buy those things, they will continue to both be poor and mildly content.
But the key answer to your question is that of upward economic mobility. As long as people in the US either have it or perceive it, they aren’t going to do anything to topple the upper echelon.
As a contrast, imagine if the top 1% were part of the Royal Family, and as such the only way to be part of the 1% is to be born into The Royal Family. That’s a pretty demotivating environment. And eventually the conflict you describe forces the surfs to rise up and kill the monarchy. Guys like Zuckerberg wouldn’t exist, instead all internet systems would be owned and controlled by the Royals. As would all the land, and roads, and buildings.
For all the bitching on this message board, the US still has upward economic mobility. And the American Surfs aren’t about to turn the rich into cat food (aka vote for higher taxes on the rich) because they still believe they might some day be rich.
The real irony here is that the poor in America could forgo their consumer lifestyles and allow themselves to acquire wealth. While at the same time generating less profit for the top 1%. The financial melt down was this sort of pattern. People convinced they had to have a house, the biggest house possible. As a result, those people got really poor, and others got extremely wealth.
In summary: It’s not that there is income inequality, or how wide the gap is, it’s the way that matters. That’s why I keep pointing to all the countries with a better Geni coefficient that are still hell holes. People leave those countries to live in the US because of the potential for upward economic mobility.
As as this is the one year anniversary of the the Arab Spring, it might be a good time to look at why Mohamed Bouazizi lit himself on fire. And to give you a hint, both Tunisia and the US both have the same coefficient.