The issue is not who contributes more. Certainly the rich contribute far more in philanthrophy, savings (for others to borrow), investments (to help other businesses grow), employment (so others can have jobs), and purchases (providing customers for others to sell to) than do the poor while paying the most in federal income taxes.
The wealthiest 1 percent of the population earn 19 percent of the income but pay 37 percent of the federal income tax. The top 10 percent pay 68 percent of the tab. The bottom 50% percent pay little or no federal income tax leaving the middle 40% to pay the remaining 32% of the tax.
And believe it or not, considering that the term 'rich' is a fluid and moving target in the last two years, most of those most hurt by 'raising taxes on the rich, will be in that middle 40%.
The 'poor' save little, invest little, buy less stuff, and provide jobs for nobody while using up resources and more often than not, receiving subsidy from taxpayers. And the 'poor' among that bottom 50% is a relative term as much as 'rich' is a relative term in the top 50%.
In recent years, credits, deductions, and subsidies for low and middle-income families allow a family of four making as much as $50,000 owe no federal income tax as long as there are two children younger than 17. But they use the same public services as all the rest of us use.
I like the concept of Hermain Cain's 9 - 9 - 9 plan. A 9% sales tax, a 9% income tax (on ALL income) and a 9% corporate tax. I'm not sold on the 9% sales tax part of that, but I am strongly in favor of a flat tax paid by all wage earners earning above a reasonable personal exemption. I want the federal government to be scaled back so that no more than 10% of our income, above that threshhold, will be necessary to fund it.
It God is happy with 10%, the federal government ought to be happy with 10%.