First, the tax system should raise adequate revenues to pay for the public needs of society, especially to meet the basic needs of the poor.
Which begs the question, who are the poor? The guys in the video below are able bodied enough. They're also smart enough to figure out how to score some "Obama bucks."
It seems to me that the "severe inequalities" in this system is that some folks get paid not to work!
I'd like to propose another bullet point - that those who can work should work! I think I tend to agree with one of my facebook friends on this - care for the elderly, physically and mentally disabled, and the families of our service men and women who sacrifice for our country. Everyone else, need not apply! Check this out (ironically shot by Nancy Pelosi's daughter!) and see if you don't agree.