This is a May 17, 2013, congressional hearing in the U.S. House Ways & Means Committee ("IRS targeting of Conservative Groups") with IRS Director Steve Miller being questioned and admitting taxes are voluntary, as well as Mr. Russell George, Treasury Inspector General for Tax Administration. Even Rep. Xavier Becerra is stating the fact that paying of taxes is VOLUNTARY, to which Miller agrees.
https://static.wixstatic.com/mp3/0cb160_46ba192a704241758c586a8c4b26301c.m4a
Listen to what Mike Gill has to say about the IRS
https://www.lapennaliberta.com/post/nh-muckraker-podcast-10