and harmful tax in the whole system. it raises about 10% of the revenues collected that come from the corporate tax. as we just heard, it is one of the highest in the world. it not only hurts businesses and their profits but it hurts workers. is 15% too low? if you are looking at a tax that's the most harmful, then the best thing to do is to get it as low as possible. the question is what do we do about the budgetary consequence. >> you wrote a big paper where you said cut it down to 25%. you didn't go to 15% because you know what that is going to kors. it is going to cost somewhere between $2.4 trillion and maybe $4 trillion if you include some of these other corporations in this corporate tax cut. in a decade, does the debt not matter anymore? >> so first that paper from five years ago was written in a