well at the time of draughting (early 30's )
the systems guardian class figured by 65
--for members of the broad job class--
your raw labor power was pretty much scrap
add in obsolescent skill sets .....
point ???
age for scraps subject to serious upward revisions
consider this
the system had a tacit life time average
("job life time share " "quota")
of 40 years
(some high school to 65 )
figure that quota the reduction in physical demands in aggregate job tasking
and new up to date actuarial charts and of course increased "schooling years "
and what becomes the optimal systemic water line ???
70 ??? ...72 ??