Time, you are guilty of plagiarism. You lifted your “as one libertarian put it” statement from Michael Anton’s Rejoinder: Dear Avengers of the Free Market . . .</em? in the blog Law and Liberty without citing him. If your post was part of an academic work you could have been kicked out. Not only that
“Most cases of plagiarism are considered misdemeanors, punishable by fines of anywhere between $100 and $50,000 — and up to one year in jail. Plagiarism can also be considered a felony under certain state and federal laws. For example, if a plagiarist copies and earns more than $2,500 from copyrighted material, he or she may face up to $250,000 in fines and up to ten years in jail.” (From plagiarism.org)