This has been going on for decades, and not just insurance, but grant based schemes etc.
As an example, about 20 years ago, I had a medical procedure done privately. Originally it was going to be done as part of (iirc) Bupa package but in the end I paid myself. I got to see both Bupa and self funded costs. I can’t remember the specifics other than there was a considerable difference in cost for what was the exact same procedure, in exact same location at exact same timeframes by the exact same consultant who I happened to indirectly know so no confusion as to who did it.