I'm not saying for purposes of multitasking.You can do more than one thing at once and actually have to for continuity but also, Internal to the country and external to the country separation's actually make a lot of sense.
How much money cannot be accounted for at this time? Trillions??? If not that near that number. if you cannot account for that it is on PURPOSE.
I'm saying as a gesture of good faith to the American taxpayer who has been butt****ed for decades, get rid of the IRS first. Maybe do a 2 year experiment - tell the IRS to back off and see how much taxes are collected for 2 years.