Wow, what a topic! I'll add a few more of my two cents worth then I think I'm done. Whether taxing the higher incomes is fair or not, I personally don't mind giving up more if I have enough to live on. How much money does one really need to have? Happiness alone does not come from money. I would be happy to give a higher share if I know it's helping someone out. If my taxes go to irresponsible spending, no I'm not happy with that.
You're free to give away your money at anytime. In fact I encourage everyone that thinks it's ok to take from those that have and give to those that have-not to give til it hurts. That your right. It just not right to force people to give to support those that won't do the hard work hard work it takes to maintain a decent lifestyle. I give quite a bit to my church and local charities, I don't need the government making the decision for me who to give to.
People that ask "How much money does one really need to have?" really chap my a$$. Its none of your business how much money a person thinks they need as long as we live in a free society. You just worry about your own conscience and let others worry about theirs.