I don't understand. Can you elaborate?

The Laffer curve simply shows the relationship between taxation and government revenue. It has nothing to do with the policies and the economic theories. In fact, there are two points on both sides of the Laffer curve's maxima where tax revenues are the same in theory. That's just a simple didactical tool, nothing more.

Saying that the Laffer curve is the trickle down economics is as bad as saying that visualizations of a binary tree are what we call algorithms and data structures.

The Laffer curve is the basis for what was called "trickle down economics".

The Reagan administration argued the US was the right side of the curve, and that lowering taxes would result in economic growth ("a rising tide raises all boats"). Economic growth benefits every worker.