The trickle-down theory is the theory that benefits given to people at the top of a system will eventually be passed on to people lower down the system. For example, if the rich receive tax cuts, they will pass these benefits on to the poor by creating jobs.
The government is not simply relying on trickle-down economics to tackle poverty.
trickle-down in British English
adjective
of or concerning the theory that granting concessions such as tax cuts to the rich will benefit all levels of society by stimulating the economy