The premise of trickle down economics is that a rising tide lifts all boats, which has occurred.
I don't think this is correct. "A rising tide lifts all boats" is a metaphor to say that an improving economy benefits everybody, and most people agree on the general idea. But nothing is trickling down with this metaphor, all boats are lifted together. Trickle down economy is the idea that helping the rich get richer will eventually benefit the poor (under the assumptions that the rich know best how to improve the economy, and that they will use the money to do it). Here many people disagree.
I don't think this is correct. "A rising tide lifts all boats" is a metaphor to say that an improving economy benefits everybody, and most people agree on the general idea. But nothing is trickling down with this metaphor, all boats are lifted together. Trickle down economy is the idea that helping the rich get richer will eventually benefit the poor (under the assumptions that the rich know best how to improve the economy, and that they will use the money to do it). Here many people disagree.