Do you have references for those figures? I'm quite interested.
I'm especially interested in how those figures account for the feedback loop as the poor typically work for the wealthy, so I expect the gap in those figures is potentially larger.
Spending from a finite pot will grow the economy more if it goes to poorer Americans. That should be obvious to anyone. The wealthy will save it, the poor will spend it and it will often pass through multiple hands.
I'm especially interested in how those figures account for the feedback loop as the poor typically work for the wealthy, so I expect the gap in those figures is potentially larger.