This requires a fuller explanation.
It was the Constitution that prevented the tyranny....the government becoming a monopoly.
1. Justice James McReynolds, for instance, announcing from the bench in 1935 his dissent from Court decisions upholding President Franklin Roosevelt’s orders taking the federal government off the gold standard, famously uttered extemporaneously a line not found in his written opinion: “The Constitution, as we have known it, is gone.” Remarks of Philip B. Perlman, Solicitor General of the United States, at Proceedings in the Supreme Court of the United States in Memory of Mr. Justice McReynolds, 334 U.S. v, x (Mar. 31, 1948).
2. In July 5, 1935, in a letter to Representative Samuel B. Hill of Washington, the President manifested his contempt for the Constitution. Hill was chairman of the subcommittee studying the Guffey-Vinson bill to regulate the coal industry: the purpose of the legislation was to re-establish, for the coal industry, the NRA code system which the Supreme Court had unanimously declared unconstitutional. Roosevelt wrote: "I hope your committee will not permit doubts as to constitutionality, however reasonable, to block the legislation.
This was the same Roosevelt who had sworn an oath on his 300 year old family Bible, to "preserve, protect and defend the Constitution of the United States."