"Taxing the rich" accomplishes...nothing

"If you took every single penny that Warren Buffett has, it'd pay for 4-1/2 days of the US government. This tax-the-rich won't work. The problem here is the government is way bigger than even the capacity of the rich to sustain it. The Buffett Rule would raise $3.2 billion a year, and take 514 years just to pay off Obama's 2011 budget deficit." -Mark Steyn

Remarkable. Can someone tell me why this simple fact was never raised by the GOP during the campaign, like during a debate???