The world's wealthy sock away a larger percentage of their wealth than the poor. Virtually every penny the poor obtain winds up back in the economy, and because of the economic multiplier effect, those pennies have a greater impact as they wind their way through the system.

https://ips-dc.org/wall_street_bonuses_and_the_minimum_wage/

> All those dollars low-wage workers spend create an economic ripple effect. Every extra dollar going into the pockets of low-wage workers, standard economic multiplier models tell us, adds about $1.21 to the national economy. Every extra dollar going into the pockets of a high-income American, by contrast, only adds about 39 cents to the GDP.