We are in an unusual position here. The mothers go 600 kilometres away
to have their babies at a major hospital ( we have only a GP and
nurses on the island )  Yet the indigenous population still has a
99 -100% breastfeeding rate. I think they simply do not see formula
feeding as an option unless the mother dies.

The mothers are persistent and because the extended family is strong
and also supportive of breastfeeding, problems are worked through. In
our society, if everyone breastfed and you were having a problem,
there would be a known solution, simply because it was part of
everyday life.

Indigenous mothers here do not work outside the home in a formal sense
(they fish and gather food). Their days are spent with their children
and extended families, babies are breastfed.
Just one other thing - the women don't seem to wear bras to feed  - or
much at all really. If breasts droop a bit more, is it easier to just
poke it into baby's mouth while baby is tucked up on your lap than if
it is encased in cotton and lace and pointing straight ahead? :-)

Querida
In hot, wet Northern Australia