trickle-down
adjective [ before noun ] uk/ˌtrɪk.əlˈdaʊn/ us/ˌtrɪk.əlˈdaʊn/
滴入式的，涓滴式的
used to refer to a situation in which something that starts in the high parts of a system spreads to the whole of the system
The supposed trickle-down effect of lower taxes for the rich has not yet resulted in greater prosperity for society as a whole. 预想中给富人减税的涓滴效应还没有给整个社会带来更多的繁荣。