First off, no proponent of
Supply-Side Economics (to my knowledge) has ever called it "Trickle Down Economics." Or if they do, they know little to nothing about the theory. "Trickle Down Economics" is what opponents of Supply Side economics called it. This would be like me starting up a thread straw-manning
Demand-Side Economics and asking "Is anyone here in favor of
Venezuelan Starvation Economics and thinks that it will work?"
Yes, supply side economics works. But here is the thing: It works to lower unemployment; it works to expand corporate profit; it works to do that because help private individuals keep more of their own money (whether a lot or a little) to invest their money where they believe it will do the most good to for them, rather than where the government believes it will do the most good for them. But, and here is the thing,
it does nothing to cure deficits. I do not believe you can can cut taxes and keep spending at the same rate, and then claim with any degree of certainty that the future explosion of economic growth will make up for the ballooning debt.
Well, I take that back. You can claim that. But you would probably be lying through your teeth by doing so.