I'm not arguing with your basic point but I would point out that AARP isn't an objective source and does not always look out for the best interests of seniors.

AARP makes the majority of its income from selling Medigap policies. Those are the policies that someone on traditional Medicare would use to pay for the 20% that Medicare doesn't cover.

The chief competitor to Medigap is the Medicare Advantage (MA) program, that is now selected by a third of all Medicare recipients. Anyone on Medicare Advantage( moi included ) has no need for Medigap. So when the original Obamacare was set to drastically reduce the MA program (it was the $750 billion Medicare savings that Obamacare projected) there was a deafening silence from AARP. They weren't at all concerned that a third of all seniors could lose their chosen Medicare because it would likely improve AARP's bottom line.

So once again, you should follow the money.