Any successful person really hates taxes. Why do we hate them so much? Because they are not levied in a fair and just manner. If everybody had to pay x% of their income in taxes, that is fair. But instead we have a progressive tax system where the more successful you are, the more you have to pay. Why should I get punished for being successful when some freeloader out there doesn't pay anything? Did they chip into my costs, time, effort, and hardships so that I could go get graduate degrees to pave my road to success? No. So why should I have to pay for them?
This is redistributive socialism at its best. And the U.S. is at the top of the pack with the most progressive tax system for OECD countries.
And how is it not discrimination? Change income to some other category such as race where different ethnicities get charged different tax rates, and you'd have a firestorm in this country.
But yet it is easy to discriminate against 'wealthy' people because they are a minority (by definition) and make up a small percentage of the population. The majority throughout history has always discriminated against its minority population for their benefit.
And here's another thing. They get labeled 'wealthy.' There are two parts to wealth: stock and flow. People who are wealthy have a large stock of assets. Either they built up that stock over a lifetime or they inherited a large bundle. The other part of wealth is flow. This is the income that you make each year. A large flow of income grants you the potential to become wealthy, but that doesn't mean that everybody earning well is in fact wealthy. And one also must consider where many of these high earners live: New York, San Francisco, Chicago, etc.: all places that are much more expensive (and also with high state tax rates) that other areas of the country. Someone making more than 100k a year is by no means wealthy in one of these cities, but they treated as such by the tax code.
On another note, Inter-generational distribution of wealth is probably not fair. Warren buffet calls it the 'womb lottery.' Capitalism is survival of the fittest for economies where those who have good ideas or work harder than others get rewarded for it. Inheritance throws a kink into the system because it allows those who contributed nothing to society to be rewarded for it (Think: Paris Hilton). Some do turn their inheritance into successful businesses, but then that is another issue if it were fair for them to get a leg-up on everybody else.
There is a good story that exemplifies the tax burden, and while fictitious, it has a good message.
Also, recently the new york times published an updated table related to who pays taxes in this country. I couldn't find the original article for the new figures, but I found a copy of the table that shows who pays taxes in this country. Essentially, the bottom 50% of Americans don't pay income taxes. Those making more than 70k a year pay about 90% of all federal income taxes. So, by being successful we get punished and leeches gets a free ride.