Ah, so let's change the entire system (and spend a shipload of money doing it) in order to correct the 5% that get overpaid? Genius.
More genius. Dude A has an income of $45K. He has no chronic health issues, lives quite simply, owns his own home, only travels to AZ where he spends 3 months of the year, etc. Dude B has an income of $60k a year, spends (like my mother used to) a net ("net" referring to meds that are not covered by insurance) total of about $8k on meds, about $x on user fees for therapies, about $y on home assistance, etc.
I don't know. Is that a reasonable figure?
Well, I don't like assuming figures for one thing. Too many "ifs" is the reason.
I thought the discussion point was getting rid of OAS. But either way, I bet that the incidents of overpayment of OAS isn't as huge as you make it out to be,