As you tell more lies to cover up previous lies, each new lie is that much more implausible and easy to see through. From Robert Wright at aier.org:
Many times throughout history, policymakers have doubled down on their own mistakes, refusing to believe that they were wrong or hoping that somehow doing the wrong thing twice or thrice would somehow make things right. Then it all came crashing down at once and the rulers lost their minds, and sometimes their necks or heads.
Economic, governance, and social systems often rely on each other in ways not readily discerned by narrow technocrats. When one crumbles, the others fall in rapid succession while all the putative experts express surprise. Look at the way that the U.S.S.R, one of the world’s two “super” powers, fell apart in the late 1980s when it lost enough feathers from its peacock tail in Afghanistan that its lies about the superiority of its command economy became obvious even to its own systematically deluded subjects.
When NPR proved inadequate to prevent Americans from seeing the few feathers left in America’s peacock tail, as evidenced by the surprise victory of Trump and his MAGA messaging in 2016, mass media joined forces with various “progressive” elements to create a propaganda machine that puts the old clunky Soviet state media to shame.