I've been involved in hiring decisions on teams I've been part of for a long time now. Blatant plagiarism, obvious embellishments and more subtle BS is literally part of the game unfortunately. This is particularly prevalent when dealing with (almost) any consultancy, large and small. I will not specifically call out names, but the some of the largest and most well known consultancies do this as a matter of practice…
I wish this were the case, but I don't think it's true. On the one hand, real, proven experts do get called in to fix these phonies' messes. On the other, often these people succeed often enough that it devalues our labor as a whole. Finally, if employers cannot determine real experts from fake, then it means they won't pay real experts their full worth (eg 'full worth' of 100k, 5% chance it's a fake = pay of 95k).
These costs of lower trust show up elsewhere, but they are hard to quantify and make everyone's life worse.