That is ignored, and is a problem, but legally, our federal government is limited in powers.
/johnny
Dr. Boys is using the word "authority" as to mean "power" as per Art. 1, Sec 8.
In his title, Dr. Boys is using the word "power" as the physical ability and machinery to enforce its will, legitimately or illegitimately, as in guns, armament, soldiers, policemen, etc. ; the teeth, used rightly or wrongly.