Myth #7: Letting people keep what is theirs costs money.I will add Myth #6: Cuts in personal income taxes pay for themselves.
Of course, no economist worth his or her salt believes this - notice that the article deals with debates amongst economists. However, a wide swath of a certain part of the political spectrum continues to hold this belief as if it were a religion. Those people don't know the difference between a stove and a stochastic. But it is a widespread myth nonetheless. And all tribes need their myths.