Because as the economy grows more wealth is created for everyone. It is not a zero sum game.  "Tax cuts for the last 40 years have given you most of the debt we have now ."  What a completely ignorant statement.   Government borrowing is the cause of our hyper-debt.  Our economy cannot run when the fat pig of government is sitting on its back.  The government is extremely overweight, and crushing the backs of the American worker and investment class.  Tax cuts create wealth as investors invest in America's growth and everyone wins.