also, the bigger issue is the inherent unfairness of a tax code that is based on raw percentages rather than purchasing power. as i have said before, if romney and i were taxed at the same rate (lets us say 30%, even though that is what i paid, while he has paid between 0-13.9%) he may pay way more in taxes, but 30% of my household income affects my spending and security much more than his.
This is exactly what makes a flat tax regressive, and a bad idea.
The rest of your post is spot on. Giving rich people more money doesn't accomplish a whole lot. There aren't going to suddenly be more jobs because of it, and they likely won't go spend that money like a poorer person would. Trickle down economics is 100% bullsh#t. The reality is that it trickles up. All of it. When the middle and lower class have more money to spend, they do so. It drives economic activity. And where does the money they spend eventually end up? At the top, of course. It seems so incredibly obvious that I have no idea why anyone would ever think otherwise, and start claiming that the problem is actually that the rich don't have enough money and the poor have too much.