We are currently living with the results of Trickle-Down economics (AKA Reaganomics, read a book) which is exactly the drivel that you are spewing now. It Doesn't Work!
Neither supply-side nor demand-side have anything at all to do with the current situation. It's totally irrelevant. That's not where the problems are at all.
And supply-side seemed to work pretty well for a quarter-century, certainly a lot better than what came before.
Also note that resorting to supply-side or demand-side dogma won't do anything to help right now. Once a bank-system fix is in place - and it doesn't exist yet - then a demand-side-type quick-hit stimulus may be better than supply-side at first: in such a situation you're less concerned with which is more efficient in the long run than you are with getting economic activity started immediately.
The question is to what extent will this new economic activity make life better for American people?(which is the ultimate purpose of any kind of economic activity)
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"If you keep making fun of me, I might just get pissed and not post on here anymore. Start taking me seriously. I'm a student now" Fatja