In 1980s Congressional testimony the FAA was told
that airmen should not get their medicals unless it could
be predicted there was less than a 1 per cent chance of a
cardiac event in the next five years. This was given as
the reason a Cessna 140 driver is held to a higher medical standard
than truck drivers, nevermind that some trucks are orders of
magnitude more dangerous to third parties than a small Cessna.

I would appreciate whatever information is available on this
testimony - preferably the full text of the discussion and
who said what.