We are actually taking in more money from the upper class than ever before. Their tax rate has gone down, but our current distorted economic system is diverting so much extra money their way that they are paying more dollars.

If trickle-down worked this might be good news for the rest of us. But it never has and there is no evidence that it every will.

That's the short version, for the extremely long version I highly recommend Wealth and Democracy.

Cheers,
Ben