"They don't need it"
Unless you are the richest person in the world, there will always be someone with more than you, that you can state that about, to try to justify taking it from them.
True enough - but there should be a reasonable bright line where you are making, say, 100 times more than the average wage for a worker in %COUNTRY_YOU_LIVE_IN% where we can argue that paying a lower percentage in taxes than said workers is not contributing back enough.
I bring in approximately 5% of what Romney makes, yet I pay slightly more than double the percentage in taxes. That's because his horse and car elevators etc. are business expenses, while my car and clothing purchases are not (also that nifty rule about money you earn is taxed at 35% while money your money earns is only 15%).
And tax rebates are a misnomer - some companies actually receive "rebates," larger than their total tax payments. I will continue to call those subsidies, since they in no way earned that money.