Sorry, you're wrong. The method of collection is HUGE.
Read Hamilton's words in the Federalist. The Founders understood that THE WAY you collect taxes is every bit as important as HOW MUCH you collect.
[b]The method of collection is HUGE.[/b]
...and, you will not be able to touch it without affecting hundreds of thousands of pages of special interest financing imbedded within our tax code. Not just the budgeted stuff, but, also, very significantly, all of the unbudgeted items.