OP: Taxing the poor is just stupid. Plain outright stupidity.
Taxing the bottom 50% at 100% would (arbitrarily) only raise cash equivalent to a few percentage points of the top 1%.
Things should not be "given out" for free, but we also have to realize that doing things like denying immunization and medical care (at least on the basic level) just makes for a very large disease base and eventual loss in productivity of our base level workforce. As harsh as it sounds, a good farmer does not let his stock get sick.
As for our tax laws, we do need to strip them back down to basics. But we also need to look at any programs that have worked to increase productivity and efficiency. As mentioned, encouraging education makes for people who get better jobs, earn more, and can be taxed more. But our whole system is still screwed up in many ways.
People have been mentioning deductions for children, but as you earn more, these deductions actually become liabilities (as our accountant told us). Also, things such as ROTH 401K accounts are rendered useless when you earn too much as you are no longer allowed to contribute. As if $5K/yr is something that would pose too much of an unfair advantage once you earn more than $x/yr? Bah!
And marriage! Since when does the woman earn 60% of the guy? Why are married tax brackets and other standards lagging 30-40 years beyond reality? Single, level "Y" is $100K, but Married level "Y" is $160K?
WTF?
And then you have Capital Gains tax. While there is a risk in investment, a study needs to be made to see what that risk actually is to balance the risk against encouragement for private investment.
Balance the risk with a deduction, say 10%, on earnings and you get 0% on some casual day trader that made $10K in one year, but 25% (as opposed to 15%) on The Man that made $4B.
But in our quest to simplify the tax code, the first that usually gets hit are the programs that need it the most. Charitable deductions removed? Well guess what happens at the Church, or other organizations. Habitat for Humanity? A program that works MUCH better than Welfare (free) housing bites the dust.
The code needs to be reduced, but taking a tax code that is as tall as a man to a single internet post/thread is inviting disaster. What we talk about here is a base to start with. Hopefully enough of you know that a simple solution only works with a simple problem.