3,000,000,000,000 - 12 zeroes in a trillion, a million million, a lot of freaking money. Three trillion is about 10,000 dollars for every man, woman and child in this country. I don't know about anyone else, but the idea that we have a revenue problem is a joke. We need to control our spending. Right now we spend a trillion more than we take in. If we just held spending constant, revenues would eventually equal spending. And when revenues continue to rise, so can spending. One day we would have 4 trillion, then 5, then 6, then...does it really matter once you have that much money?
Politics is increasingly less and less about money, and more and more about psychology. Why does income inequality matter? Because it makes people unhappy to have less than the guy next to them, even when they have quite a bit themselves. Happiness is a psychological state, not a material one. Liberal politicians understand this; they point out happiness problems and offer "solutions" to those problems.
The reality is that we need to placate people whose only problem is their own greed and envy. Like it or not, but a problem in someones head is a problem we need to solve.