In the US our office of tax simplification would also need an oversight committee on tax simplification regulation, an office of tax simplification administrative affairs, a center for tax simplification reform, and an office of tax simplification simplification.
And its own SWAT team. Heck, even Dept of Education has one these days. It's a good way to get attention to one's political viewpoints. :)
To top it off, congress wouldn't actually allocate funds to any of it.