There's no such thing as 'trickle down'. Cite me one serious economic paper which has referenced it. It's one of those things that through shear force of repetition people believe that it is a real theorem.
http://www.psmag.com/business-economics/trickle-down-economi...
Trickle down was pushed by many politicians, and it failed. whether it's a real theory or not is totally irrelevant to the point.