Terry Collins writes:

Which reminds me of something that I was once told and that was that
most cars on the road are company cars, which, if correct, means that
many more people own bicycles then cars.

Who do you have to root to get salary sacrifice concessions for
commuter bicycles?

I did a bit of googling, found an article from the
UK about it being allowed over there if the primary use is
commuting. Found nothing about it in Australia, though.