Why don't you go reexamine yourself and ask What Would Jesus Do? .
One thing I'm pretty sure he would NOT do is say, "Have Government take money from other people and give it to the poor." I think he'd say "YOU help the poor."
I don't think they should necessarily tax the poor more. What they should do is reduce government to the point where we would not need to pillage a relatively small percentage of the population in order to sustain such massive expenditure. Someone said something about the majority supporting this. Well, OF COURSE. That's because the majority gets the "benefit" of massive expenditure while a minority of the population bears the overwhelming preponderance of the cost.
It's not just the income tax either. Go to
http://www.cbo.gov/ftpdocs/88xx/doc8885/Appendix_wtoc.pdf and look at Table 5. The share of total federal tax liability borne by the top 20% was about 69% as of 2005. The bottom 40%, meanwhile, bore less about 5% of the burden. You can see that the top 40% bore about 86% while the bottom 40% bore about 14%. It's pretty easy to support expensive government when you're not the one paying for it.
A "moral" tax would require that everybody who lives in the country pays an equal share of the cost of running the government. And, I assure you, if we had such a system people wouldn't be supporting anything remotely like the level of expenditure the United States government engages in today.
As far as charity goes: It should be voluntary. Charity should not be compelled by government as it is now.