Taxfoundation.org/article/details-and-analysis-donald-trump-s-tax-plan
that doesn't say that his "economic package should produce the highest average growth in all sectors versus other candidates." it does say that trump's plan would increase GDP by 11.5%, but that comes at the cost of an additional 10 trillion dollars in debt over the next ten years: "Overall, the plan would reduce federal revenue on a static basis by $11.98 trillion over the next ten years...However, if we account for the economic growth that the plan would produce, the plan would end up lowering revenue by $10.14 trillion over the next decade. The larger economy would increase wages, which would narrow the revenue lost through the individual income tax by about $666 billion and increase payroll tax revenues by $839 billion, with the remainder of the recouped revenue coming from other taxes."
the return on the increase in growth isn't as large as the loss of revenue. as i understand it, debt isn't bad per se, but doubling our debt for 12% GDP growth is a poor bargain.
the tax foundation's own alan cole penned a piece titled
Donald Trump’s Tax Plan Will Not Be Revenue-Neutral Under Any Circumstances, in which he writes, "As you can imagine, then, I was puzzled by this statement in Mr. Trump’s piece: “With moderate growth, this plan will be revenue-neutral.” I do not believe this to be true under any scenario remotely resembling Mr. Trump’s plan...Tax cuts can do a great deal of good; each of the provisions I outlined above could help a lot of people lead better lives. However, the reductions in federal revenue need to be acknowledged, and likely mitigated through substantial cuts in spending, in order to make this plan feasible."
i don't think trump can get this proposal though congress, i don't think he can get the subsequent budget cuts he would need to make it worthwhile, and i wouldn't want trump to be in charge of that process anyway.