I'll keep this simple. With the Bush/Obama tax cuts, certain people have the following income tax structure:
First they deduct any deductions they have.
Then the next $34,000 is completely tax-free. (More if married.) It's called the "0% bracket".
Then anything else is taxed at a maximum of 15%.
Who are these people? People who don't work for a living, but instead live off dividends and capital gains.
Then look at your own tax rate (which, if you're a working stiff, starts at 10% after deductions and goes up from there -- plus Social Security and Medicare taxes, which don't apply to investment income).
Does this strike you as unfair? Have you stopped to compute HOW unfair? Have you wondered why nominally Democratic elected officials signed the extension of this?