I mean, when I googled supply-side economics it said it was another name for trickle-down economics. I'm interested in how you'd say they differ, honestly, not trying to be argumentative.
It seems obvious that there is an optimal tax rate, too much or too little is bad. But I'd definitely say right now we are far far on the too little side of things.
I found at least found one analysis (by a left leaning think tank, so take it for what you will) https://www.americanprogress.org/article/the-failure-of-supp... that seems to show that supply-side economics hasn't panned out.
It seems obvious that there is an optimal tax rate, too much or too little is bad. But I'd definitely say right now we are far far on the too little side of things.