The theory is this tax reform bill will enable the economy to take off and grow at such a rate it will pay for the tax cuts plus generate a whole lot more tax revenue on top of that. So your post is at best dishonest. Some Dem's suggested maybe half the tax cuts and test that for a few years to see if this theory proves true, but half measures were likely not to work. We need to hit a tax cut threshold for the economy to get cooking with gas.
So give it a few years and if it doesn't work you can celebrate. Certainly doing nothing was wrong. Obama doubled the damn debt and what do we have to show for it. So now we'll give Trump's plan a try he can hardly do worse than your guy.