Here is an interesting statistic - in 2009, according to the Tax Policy Center, a Washington research organization, about 47% of American families didn't pay any federal taxes at all. So while we argue about whether or not to tax the wealthiest 5% of the people more, almost half the nation isn't paying any taxes. Funny how this doesn't get mentioned much in the current debate.
Perhaps the fairest thing is first to get everyone to pay SOME taxes, before we raise the tax rates more on the top earners.