Well, it's called American Dream.
However, only a few will make it to that stage, most just surpass their parents in standard of living, and thus fullfill the dream.
But all are raised to *want* it, even if few can make it. If we're to believe that high income hurts the economy, we must now teach our children that too want the American Dream is actually a bad thing. Or alternatively (and confusingly) that it is OK to want the American Dream, but not OK to actually achieve it.
Also, the level of poverty is relative.
Officials have a cutoff number for poverty. I think it's the same across the country and does not take into account the differences of standard in different regions.
Also, if you make one dollar more than the magic number, you are no longer considered poor. Does not buy you much at the grocery store, but hey, it's good to know you are not really poor.
Also, any given living standard is relative. If you always had what you got, you won't know the difference. If you had less, you are doing better, but making due with less than what you have is being poor.
While true, what does that mean to the question about income disparity?