trickle up
trickle up
phrasal verbphr v 
if money trickles up, it moves slowly from the poorest people to the richest people in a society, or from the poorest countries to the richest countries 〔财富向上渗透〔指穷人、穷国的钱逐渐转移到富人、富国手中〕
if money trickles up, it moves slowly from the poorest people to the richest people in a society, or from the poorest countries to the richest countries 〔财富向上渗透〔指穷人、穷国的钱逐渐转移到富人、富国手中〕 → trickle up at trickle1(2)