"Progressive vs. Regressive Tax Structure". Faded.org - It is appallingly unfair because the rich are the ones who benefit the most from government. How do they benefit more? In almost every way. On the most basic level the government creates and enforces the laws that protect their property. The government invests in the nations infrastructure for things such as national defense, public education, transportation, energy. Without this infrastructure in place *and maintained*, the rich would not have been able to become rich, or be able to maintain it. I read too many comments from people who think that the rich made their money in a vacuum. The welfare of their workers, and the welfare of their society depend on these taxes.
We're not talking about putting the rich into the poor house. We're talking about 4.3% (no slippery slope arguments here please.) With the rich disproportionately benefiting from what government and society in general are providing, it only makes sense that a progressive tax system is proportional and fair. You can argue all day long that our government is wasteful, and needs reform. On those arguments I'll likely be right beside you (depending of course on what you're considering wasteful). However, you can not ignore the functions that government, and taxes do provide.
Argument: Wealthy benefit more from system, so owe a greater tax debt - Debatepedia