They say a gaffe is when a politician accidentally tells the truth. So I suppose Democratic congressman Steny Hoyer committed a gaffe when he said that he opposes a constitutional balanced budget amendment because it would make it "virtually impossible" to raise taxes.
That's kind of the point. Raising taxes should not be easy to do. The last time I checked, we still have property rights, and it should not be easy for the government to simply decide to take more of our property and give it to whoever they want.