It should just be national policy. If you’re in one of the big 3 branches of government then you get an autopsy. It’s common sense.
It doesn’t make sense to me to cut and paw through your remains simply because you were a government major player and someone wants to “make sure” there was no foul play-it sounds ghoulish not to mention arbitrary-you’d need a consent form for that as a condition of employment before filling any office/position, and a don’t think many would sign such a thing. I certainly wouldn’t, and I can’t think of anyone I know who would-better to work where my wishes, and those of my family are respected.
There is also the possibility of false evidence being planted in an autopsy-government being so trustworthy and all that-maybe somebody gets paid to plant evidence to take down a political rival on a murder/accessory to murder charge-sounds more like something the mafia would do than what goes on in a free society-nope, don’t like the idea at all...