Trickle down with the emphasis on trick. Next time you see a hungry homeless person find the nearest mansion and slip a $20 in the mailslot. It should trickle down in no time.
One of the subjects getting a lot of attention, what the old newspaper guys would call a lot of inches, and I suppose the same would apply to the net, is the gap in wealth from top to bottom of the social order. They classed the US as a poor country with some pockets of very wealthy people.

The chart was too big and the first and last box had no US data so I lopped them off and added them below if you're interested. The somewhat scattered vertical numbers are thousands of dollars of disposable income.