"I found Chait's article quite interesting, especially the part where he says he supports the war in Iraq."

All that proves is he isn't a moron.

Jonathan Chait says:
"Nothing feeds anger and bitterness like the belief that the media is ignoring your views. Conservatives should know this as well as anybody."

Forgot about the Conservatives, what most of the general public?

"Shifting the federal tax burden downward makes middle-class taxpayers less likely to support future government programs, since they will have to pay of it themselves, rather than having a disproportionate burden picked up by the affluent. "

Typical Dem thinking.
Why should the rich pay for programs in which the middle class wouldn't want to pay for? It's the simpleton view of "Why not have a bloated bureaucracy- I don't have to pay for it".
It's simply a lie. It's a silly shell game. Of course, the middle class will pay for the govt programs- it's only an illusion that they aren't paying for it.
The only really valid reason why you want high taxes is because you want to limit economic growth. There are good reasons why you want to limit grow. Generally speaking if you want the poorer to get richer, you should favor more growth (though too much growth can cause seveve economic crashes, so that obviously is not good for poor people [and obviously isn't good for rich people who are reckless in their investing]).
If you want to make the poor poorer, increase taxes and waste wealth by lowering a nation productivity, and force anyone who wants to make money to find a better markets for their capital [or simply don't put their money in any market].