trickle-up
originally and chiefly Politics and Political Economy
adjective
Of, relating to, or based on the theory that wealth, information, change, etc., moves or should move upward through a hierarchical structure or organization (as a company, an economy, a social group, etc.).
noun
This theory or an instance of it in operation.
Origin
1950s; earliest use found in The New York Times. After trickle-down.