COI is a very, very grey area. When I worked at The Lancet, CoI was considered if you'd received any payment by Big Pharma. But I realised how problematic this is when I worked in research, because often drugs companies will pay for you to attend conferences, will pay for you to eat while at the conference, and will sponsor the talks you want to attend. And they all pile in, so there is no perceived favouritism. And the work I did had nothing to do with the medications anyway, so what did it matter.
And I guess for these guys it's the same. They don't see that they are being influenced as such by taking money or working "for free" for insurance companies and the like. They already hold the views they hold. They are simply advising others. And all of this is already in the public domain anyway, etc, etc. There is no conflict; those companies interests are their interests; so why declare it?