by kleinbl00

But some "taxpayers with more complex sources of income, most of whom are in high-income brackets" are able to avoid paying what they owe. In recent testimony before Congress, IRS Commissioner Chuck Rettig said that he believes the "tax gap" — the difference between what is paid to the IRS and what is owed — could exceed $1 trillion annually.

That's 20% of revenue, or more than the entire tax base of the United Kingdom.